CN111147035A - Face image recognition information regulating circuit - Google Patents
Face image recognition information regulating circuit Download PDFInfo
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- CN111147035A CN111147035A CN202010070070.XA CN202010070070A CN111147035A CN 111147035 A CN111147035 A CN 111147035A CN 202010070070 A CN202010070070 A CN 202010070070A CN 111147035 A CN111147035 A CN 111147035A
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Abstract
The invention relates to a human face image recognition information regulating circuit, wherein a signal receiving circuit adopts a bidirectional amplitude limiter and a differential amplifier to receive human face image information output by a camera device, then the human face image information enters a signal amplifying circuit, adopts band-pass filter and band elimination filter to be amplified by combining an amplifier consisting of triodes Q6 and Q7, and is provided with a noise reduction circuit to further stabilize the signal amplitude after amplification, a two-stage feedback circuit performs first-stage attenuation on the output signal of the signal amplifying circuit and then negatively feeds back the signal to an emitter of a triode Q6 to control the gain of the amplifier, or performs first-stage attenuation and second-stage attenuation and then feeds back the signal to a differential amplifier, and simultaneously regulates the gain of the amplifier and the gain of the differential amplifier to finally make the output signal of the signal amplifying circuit constant, finally makes the output signal of the signal amplifying circuit constant, and, and a source follower which takes an MOS tube T1 and a triode Q8 as cores is adopted for further impedance conversion and then output to a subsequent circuit.
Description
Technical Field
The invention relates to the technical field of information adjustment, in particular to a facial image recognition information adjusting circuit.
Background
The face image recognition is a big hotspot in the current biological feature recognition field, has the obvious advantages of intuition, convenience, non-contact, friendliness, high user acceptance and the like, in the face image recognition, the quality of the face image collected by the camera device directly influences the recognition performance, because the output current of the camera device is very small, weak signals can be transmitted to a remote subsequent circuit for correction and compensation only by amplification, the corrected and compensated signals further enter an image recognition circuit for face modeling and retrieval, the face image recognition is completed by the method, the existing face image amplification is carried out by a differential amplifier and negative feedback, although the circuit structure is simple, the requirement of amplitude is met, but simultaneously, the noise and clutter in the face image signal are also amplified, and the requirement of the quality precision of the face image can not be met.
The present invention provides a new solution to this problem.
Disclosure of Invention
In view of the above situation, in order to overcome the defects of the prior art, the present invention aims to provide a facial image recognition information adjusting circuit, which effectively solves the problems that the prior differential amplifier and negative feedback are adopted to amplify facial image information, noise and clutter in facial image signals are also amplified when the facial image recognition information is amplified, and the requirement of facial image quality precision cannot be met.
The technical scheme for solving the problem is that the device comprises a signal receiving circuit, a signal amplifying circuit, a two-stage feedback circuit and a following output circuit, wherein the signal receiving circuit adopts a bidirectional amplitude limiter and a differential amplifier to receive face image information output by a camera device, the signal amplifying circuit adopts a band-pass filter to filter low-frequency signals and higher harmonics except the face image information, then the low-frequency signals and the higher harmonics are amplified by an amplifier consisting of a band-resistance filter and triodes Q6 and Q7, a noise reduction circuit is arranged to further stabilize the amplified signal amplitude, the two-stage feedback circuit adopts a diode to detect and filter the output signals of the signal amplifying circuit, the filtered signal amplitude triggers the triodes Q5 and Q4 to be conducted through a voltage stabilizing tube Z2 and a voltage stabilizing tube Z1 respectively, the filtered signals are negatively fed back to the amplifier after first-stage attenuation, the gain of the amplifier is controlled, the filtered signals are negatively fed back to the differential, and the following output circuit receives the output signal of the signal amplification circuit, and outputs the output signal to a subsequent circuit after further impedance conversion by adopting a source follower taking an MOS tube T1 and a triode Q8 as cores.
Compared with the prior art, the invention has the following advantages and beneficial effects: the signal amplifying circuit filters low-frequency signals and higher harmonics except the face image information by adopting an active filter consisting of a band-pass filter and a triode Q6, then the low-frequency signals and the higher harmonics are amplified by a band-stop filter combined with an amplifier consisting of triodes Q6 and Q7, the low-frequency signals and the higher harmonics are used for reducing distortion and stabilizing the working state of the triodes Q6 and Q7, in order to inhibit the interference of the face image identification information with small amplitude, a noise reduction circuit is arranged for further stabilizing the amplified signal amplitude, thereby realizing the amplification of the face image information only and inhibiting the amplification of noise and clutter, and noise reduction and filtration are adopted, when the peak value of the direct current component of the signal amplitude output by the signal amplifying circuit is more than 50% of the normal output signal amplitude, the filtered signal is negatively fed back to an emitter of the triode Q6 after primary attenuation, the gain of the amplifier is controlled, the output signal of the signal amplifying circuit is constant, after the filtered signals are subjected to primary attenuation and secondary attenuation, the filtered signals are negatively fed back to the differential amplifier, the gain of the amplifier and the gain of the differential amplifier are adjusted at the same time, and finally the output signals of the signal amplification circuit are constant, so that the gain control is realized, the accuracy of the gain control is improved, and the purity of the face image identification information is improved.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Fig. 2 is a circuit block diagram of the present invention.
Detailed Description
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of embodiments of the invention, as illustrated in the accompanying drawings in which reference is made to figures 1-2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
A human face image recognition information adjusting circuit comprises a signal receiving circuit, a signal amplifying circuit, a two-stage feedback circuit and a following output circuit, wherein the signal receiving circuit receives human face image information output by a camera device, adopts a bidirectional amplitude limiter to limit the amplitude at-1V- +1V, cuts off interference signals except the human face image information amplitude, then suppresses common mode interference through a differential amplifier, overcomes zero drift, and outputs the human face image information after differential amplification, the signal amplifying circuit adopts an active filter consisting of a band-pass filter and a triode Q6 to filter low-frequency signals and higher harmonics except the human face image information, then amplifies the low-frequency signals and the higher harmonics through a band-resistance filter and an amplifier consisting of triodes Q6 and Q7, and is used for reducing distortion and stabilizing the working states of the triodes Q6 and Q7, in order to suppress interference with small human face image recognition information amplitude, and further stabilize the amplified signal amplitude through a noise reduction circuit, the two-stage feedback circuit detects and filters the output signal of the signal amplification circuit by a diode, and controls the gain of the amplifier to make the output signal of the signal amplification circuit constant, when the peak value of the DC component of the filtered signal amplitude is greater than 50% of the normal output signal amplitude, the filtered signal is negatively fed back to the emitter of the triode Q6 after first-stage attenuation, and the filtered signal is negatively fed back to the differential amplifier after first-stage attenuation and second-stage attenuation, and simultaneously adjusts the gain of the amplifier and the gain of the differential amplifier to finally make the output signal of the signal amplification circuit constant, thereby improving the precision of gain control and the purity of the face image identification information on the other hand, finally, the output signal of the signal amplification circuit is constant, the following output circuit receives the output signal of the signal amplification circuit, the pulse component is filtered by the RC filter circuit, and the stable signal is output to the grid electrode of the MOS tube T1, the MOS tube T1 is a source electrode follower, the characteristic that the input resistance is large and the output resistance is small is utilized, the impedance transformation effect is achieved, namely the output resistance effect is reduced, the triode Q8 is connected to the source electrode of the MOS tube T1, namely the input resistance of the subsequent circuit is increased, and the signal is transmitted to the subsequent circuit truly, namely without amplitude distortion.
On the basis of the scheme, the signal amplification circuit receives the face image identification information output by the signal receiving circuit, an active filter consisting of a band-pass filter and a triode Q6 (consisting of a high-pass filter series capacitor C5 consisting of a capacitor C3, a capacitor C4 and a resistor R11, a resistor R12 and a low-pass filter consisting of a resistor R13) is used for filtering low-frequency signals and high-order harmonics except the face image information, then a band-stop filter consisting of a resistor R17-a resistor R19 and a capacitor C7-a capacitor C9 is used for amplifying the signals combined with an amplifier consisting of triodes Q6 and Q7, wherein the band-stop filter is used as a feedback resistor of the signals amplified by the triodes Q6 and Q7 and is used for reducing distortion (namely, the linearity is better) and stabilizing the working states of the triodes Q6 and Q7, and in order to suppress interference of small amplitude of the face image identification information, the capacitor C10, the capacitor C42, the resistor, The noise reduction circuit composed of the diode D4 and the diode D5 further stabilizes the signal amplitude after amplification, thereby realizing the amplification of only face image information, suppressing noise and noise, and adopting noise reduction and filtering, the noise reduction circuit comprises a capacitor C3, one end of a capacitor C3 is connected with the collector of a triode Q2, the other end of a capacitor C3 is respectively connected with one end of a resistor R11 and one end of a capacitor C4, the other end of a capacitor C4 is connected with one end of a resistor R12, the other end of a resistor R12 is respectively connected with one end of a capacitor C5 and one end of a resistor R13, the other end of a resistor R13 is respectively connected with one end of a capacitor C6 and the base of a triode Q6, the emitter of a triode Q6 is respectively connected with one end of a grounding resistor R16, the other end of a resistor R11, the other end of a capacitor C5, the base of a triode Q7 and one end of a resistor R14, the collector of the triode Q14 is connected with one end of a power supply +, an emitter of the triode Q7 is connected with one end of the capacitor C10 and one end of the capacitor C11 respectively, the other end of the capacitor C11 is connected with one end of the resistor R21, one end of the resistor R23 and an anode of the diode D4 respectively, the other end of the capacitor C10 is connected with one end of the resistor R20, one end of the resistor R22 and a cathode of the diode D5 respectively, a cathode of the diode D4 is connected with an anode of the diode D5, one end of the resistor R18 and one end of the capacitor C9 respectively, the other end of the resistor R18 is connected with one end of the resistor R17 and one end of the grounded capacitor C8 respectively, the other end of the capacitor C9 is connected with one end of the capacitor C7 and one end of the grounded resistor R19 respectively, and the other end of the resistor R17 and the other end of the capacitor;
the two-stage feedback circuit detects the signal output by the signal amplifying circuit by a diode D3, filters the signal by an RC filter circuit consisting of a resistor R36 and a capacitor C12, breaks down a voltage stabilizing tube Z2 when the DC component peak value of the filtered signal amplitude is greater than 50% of the normal output signal amplitude, switches on a trigger triode Q5 after the filtered signal is divided by a resistor R30 and a resistor R31, conducts 1/3-stage attenuation on the filtered signal by a T-shaped attenuator consisting of a resistor R32 and a resistor R35, negatively feeds back the signal to an emitter of a triode Q6 after the first-stage attenuation, couples with the output signal of an active filter, controls the gain of the amplifier to make the output signal of the signal amplifying circuit constant, breaks down voltage stabilizing tubes Z2 and Z1 when the DC component peak value of the filtered signal amplitude is greater than 80% of the normal output signal amplitude, switches on the trigger triode Q4 after the filtered signal is divided by a resistor R24 and a resistor R25, the filtered signal is subjected to 1/3 primary attenuation through a T-shaped attenuator consisting of a resistor R32-a resistor R35, then is subjected to 1/14 secondary attenuation through a T-shaped attenuator consisting of a resistor R26-a resistor R29, the signal after the secondary attenuation is negatively fed back to a differential amplifier, the gain of the amplifier and the gain of the differential amplifier are adjusted simultaneously, and finally the output signal of a signal amplifying circuit is constant, so that the gain control is realized, on one hand, the precision of the gain control is improved, and on the other hand, the purity of the face image identification information is improved The base of the triode Q5, the emitter of the triode Q5 are connected to one end of a resistor R32 and one end of a resistor R33 respectively, the other end of the resistor R33 is connected to one end of a ground resistor R35 and one end of a resistor R34 respectively, the other end of the resistor R32 and the other end of the resistor R34 are connected to the emitter of the triode Q6, the other end of the resistor R30 is connected to the cathode of a regulator Z1, the anode of the regulator Z1 is connected to one end of a resistor R25 and the collector of the triode Q4 respectively, the other end of the resistor R25 is connected to one end of a resistor R25 and the base of the triode Q25 respectively, the emitter of the triode Q25 is connected to one end of the resistor R25 and one end of the resistor R25 respectively, the other end of the resistor R25 is connected to one end of the ground resistor R25 and one end of the base of the resistor R25 is connected to ground.
On the basis of the scheme, the signal receiving circuit receives the face image information output by the camera device, a bidirectional amplitude limiter consisting of a lower amplitude limiter consisting of a diode D1, a resistor R1 and a resistor R2 and connected with a diode D2, a resistor R3 and a resistor R4 in series is adopted to limit the amplitude of the bidirectional amplitude limiter to-1V- +1V, interference signals except the face image information amplitude are cut, then the interference signals are output after differential amplification through a differential amplifier consisting of a triode Q1, a Q2 and a Q3, a resistor R5-a resistor R10, a capacitor C2 and a capacitor C14 to suppress common mode interference and overcome drift zero, the face image information is input from the base of a triode Q3, the amplified signal current flows through a triode Q2 connected in series in a collector circuit, the face image information is output from the collector of the triode Q2, the gain of the differential amplifier is controlled by the base voltage of a triode Q2, for example, when the input signal increases, the output signal of the signal amplifying circuit increases, at this time, the signal is negatively fed back to the differential amplifier after being subjected to two-stage attenuation to reduce the gain of the differential amplifier, the differential amplifier receives the face image information output by the image pickup device and comprises a diode D1, the anode of the diode D1 is connected with the face image information output by the image pickup device, the cathode of the diode D1 is connected with one end of a resistor R1, one end of a resistor R2 and the cathode of a diode D2, the anode of the diode D1 is connected with one end of a resistor R3, one end of a resistor R4, one end of a capacitor C1 and the base of a transistor Q3, the other end of the resistor R1 is connected with a power supply +1V, the other end of the resistor R3 is connected with a power supply-1V, the other end of the resistor R2, the other end of the resistor R4 and the other end of the capacitor C1 are connected to ground, the emitter of a transistor Q737, An emitter of a triode Q2, a base of a triode Q1 is respectively connected with one end of a resistor R8 and one end of a grounded capacitor C14, the other end of a resistor R8 is respectively connected with one end of a grounded resistor R7 and one end of a resistor R6, a collector of a triode Q1 is connected with one end of the resistor R9, a collector of a triode Q2 is connected with one end of the resistor R10, the other end of the resistor R6, the other end of the resistor R9 and the other end of the resistor R10 are connected with +1V of a power supply, and a base of a triode Q2 is connected with one end of the grounded capacitor C2.
On the basis of the above scheme, the signal amplifying circuit of the follow-up output circuit outputs a signal, a ripple component is filtered by an RC filter circuit composed of a capacitor C13 and a resistor R38, and a stable signal is output to the gate of the MOS transistor T1, the MOS transistor T1 is a source follower, which has an impedance conversion function, i.e., a function of reducing an output resistance, by using the characteristics of large input resistance and small output resistance, the transistor Q8 is connected to the source of the MOS transistor T1, which is equivalent to increase of the input resistance of the subsequent circuit, so that the signal is truly transmitted to the subsequent circuit without amplitude distortion, the circuit includes a resistor R38, one end of the resistor R38 is connected to the positive electrode of the diode D5, the other end of the resistor R38 is connected to one end of the resistor R37, one end of the ground resistor R39, one end of the ground capacitor C13, the gate of the MOS transistor T1, the drain of the MOS transistor T1 is connected to one end of the resistor R40, and the source of the MOS, In a subsequent circuit, the base electrode of the triode Q8 is respectively connected with one end of the resistor R41 and one end of the grounding resistor R43, the emitter electrode of the triode Q8 is connected with one end of the grounding resistor R42, and the other end of the resistor R37 and the other end of the resistor R40 are connected with a power supply.
When the invention is used in detail, the signal receiving circuit receives the face image information output by the camera device, the bidirectional amplitude limiter composed of the lower amplitude limiter composed of the diode D1, the resistor R1 and the resistor R2 and the upper amplitude limiter composed of the diode D2, the resistor R3 and the resistor R4 is adopted to limit the amplitude to-1V- +1V, interference signals except the face image information amplitude are cut, then the interference signals are output after differential amplification through the differential amplifier composed of the triodes Q1, Q2 and Q3, the resistor R5-the resistor R10, the capacitor C2 and the capacitor C14, common mode interference is inhibited, drift zero point is overcome, the face image information is input from the base of the triode Q3, the amplified signal current flows through the triode Q2 connected in series in the collector circuit, the face image information is output from the collector of the triode Q2, the gain of the differential amplifier is controlled by the base voltage of the triode Q2, the signal amplifying circuit receives the face image identification information output by the signal receiving circuit, an active filter composed of a band-pass filter and a triode Q6 is adopted to filter low-frequency signals and higher harmonics except human face image information, then a band-stop filter composed of a resistor R17-a resistor R19 and a capacitor C7-a capacitor C9 is adopted to be combined with an amplifier composed of triodes Q6 and Q7 to amplify, wherein the band-stop filter is adopted as a feedback resistor of signals amplified by the triodes Q6 and Q7 to reduce distortion (namely, better line shape) and stabilize the working states of the triodes Q6 and Q7, in order to suppress interference with small amplitude of human face image identification information, a noise reduction circuit composed of a capacitor C10, a capacitor C11, a resistor R20-a resistor R23, a diode D4 and a diode D5 is arranged to further stabilize the amplified signal amplitude, so as to amplify only human face image information, suppress noise and filter noise and clutter, the two-stage feedback circuit is adopted to filter signals output by the signal amplification circuit, a diode D3 is adopted for detection, an RC filter circuit consisting of a resistor R36 and a capacitor C12 is used for filtering, when the peak value of the direct current component of the amplitude of the filtered signal is larger than 50% of the amplitude of a normal output signal, a voltage stabilizing tube Z2 is broken down, the filtered signal is subjected to voltage division through a resistor R30 and a resistor R31 and then is switched on by a trigger triode Q5, the filtered signal is subjected to 1/3 primary attenuation through a T-shaped attenuator consisting of a resistor R32 and a resistor R35, the signal after primary attenuation is negatively fed back to an emitter of a triode Q6 and is coupled with the output signal of an active filter, the gain of the amplifier is controlled, the output signal of a signal amplifying circuit is constant, when the peak value of the direct current component of the amplitude of the filtered signal is larger than 80% of the amplitude of the normal output signal, a voltage stabilizing tube Z2 and a Z1 are broken down, the filtered signal is subjected to voltage division through a resistor R24 and a resistor R25 and then is switched on by a, then 1/14 secondary attenuation is carried out by a T-shaped attenuator consisting of a resistor R26-a resistor R29, signals are negatively fed back to the differential amplifier after the secondary attenuation, simultaneously, the gain of the amplifier and the gain of the differential amplifier are adjusted, finally, the output signal of the signal amplifying circuit is constant, by the gain control, on one hand, the precision of the gain control is improved, on the other hand, the purity of the face image identification information is improved, the signal output circuit of the following output circuit outputs a signal, the pulse components are filtered by the RC filter circuit, stable signals are output to the grid electrode of the MOS tube T1, the MOS tube T1 is a source electrode follower, the characteristics of large input resistance and small output resistance of the source electrode follower are utilized, the effect of impedance transformation is achieved, namely the effect of reducing the output resistance is achieved, the triode Q8 is connected to the source electrode of the MOS tube T1, the input resistance of a subsequent circuit is equivalently increased, and the signals are transmitted to the subsequent circuit truly, namely without amplitude distortion.
Claims (4)
1. A human face image recognition information regulating circuit comprises a signal receiving circuit, a signal amplifying circuit, a two-stage feedback circuit and a following output circuit, wherein the signal receiving circuit adopts a bidirectional amplitude limiter and a differential amplifier to receive human face image information output by a camera device, the signal amplifying circuit adopts a band-pass filter to filter low-frequency signals and higher harmonics except the human face image information, then the low-frequency signals and the higher harmonics are amplified by an amplifier consisting of a band-resistance filter and triodes Q6 and Q7, a noise reduction circuit is arranged to further stabilize the amplified signal amplitude, the two-stage feedback circuit adopts a diode to detect and RC filter the output signals of the signal amplifying circuit, the filtered signal amplitude respectively triggers the triodes Q5 and Q4 to be conducted through a voltage stabilizing tube Z2 and a voltage stabilizing tube Z1, the filtered signals are negatively fed back to the amplifier after being primarily attenuated, and the gain of the amplifier is controlled, and the filtered signal is subjected to secondary attenuation and then is negatively fed back to the differential amplifier, the gain of the differential amplifier is controlled, the output signal of the signal amplification circuit is finally constant, the following output circuit receives the output signal of the signal amplification circuit, and the output signal is further subjected to impedance conversion by adopting a source follower taking an MOS transistor T1 and a triode Q8 as cores and then is output to a subsequent circuit.
2. The facial image recognition information adjusting circuit according to claim 1, wherein the signal amplifying circuit comprises a capacitor C3, one end of a capacitor C3 is connected to a collector of a transistor Q2, the other end of the capacitor C3 is connected to one end of a resistor R11 and one end of a capacitor C4, the other end of a capacitor C4 is connected to one end of a resistor R12, the other end of the resistor R12 is connected to one end of a capacitor C5 and one end of a resistor R13, the other end of the resistor R13 is connected to one end of a capacitor C6 and a base of a transistor Q6, an emitter of a transistor Q6 is connected to one end of a ground resistor R16, the other end of a resistor R11, the other end of a capacitor C5, the base of a transistor Q7 and one end of a resistor R14, a collector of a transistor Q6 is connected to one end of a resistor R15, the other end of a resistor R597 and the other end of a resistor R3687458 are connected to +5, One end of a capacitor C10, one end of a capacitor C11, the other end of the capacitor C11 are respectively connected with one end of a resistor R21, one end of a resistor R23 and the anode of a diode D4, the other end of the capacitor C10 is respectively connected with one end of a resistor R20, one end of a resistor R22 and the cathode of a diode D5, the cathode of a diode D4 is respectively connected with the anode of a diode D5, one end of a resistor R18 and one end of a capacitor C9, the other end of a resistor R18 is respectively connected with one end of a resistor R17 and one end of a grounded capacitor C8, the other end of the capacitor C9 is respectively connected with one end of a capacitor C7 and one end of a grounded resistor R19, and the other end of the resistor R17 and the other end of the capacitor C7;
the two-stage feedback circuit comprises a diode D3, the anode of the diode D3 is connected with the cathode of a diode D4, the cathode of a diode D3 is respectively connected with one end of a grounding resistor R36, one end of a grounding capacitor C12 and the cathode of a voltage regulator tube Z2, the anode of the voltage regulator tube Z2 is respectively connected with one end of a resistor R31 and the collector of a triode Q5, the other end of a resistor R31 is respectively connected with one end of a resistor R30 and the base of a triode Q5, the emitter of the triode Q5 is respectively connected with one end of the resistor R5 and one end of the resistor R5, the other end of the resistor R5 and the emitter of the triode Q5 are respectively connected, the other end of the resistor R5 is connected with the cathode of the resistor Z5, the anode of the voltage regulator tube Z5 is respectively connected with one end of the resistor R5 and one end of the triode Q5, and the collector of the resistor R5, The base of the triode Q4, the emitter of the triode Q4 are connected with one end of a resistor R26 and one end of a resistor R27 respectively, the other end of the resistor R27 is connected with one end of a grounding resistor R29 and one end of a resistor R28 respectively, the other end of the resistor R26 and the other end of the resistor R28 are connected with the base of the triode Q2, and the other end of the resistor R24 is connected with the ground.
3. The facial image recognition information adjusting circuit as claimed in claim 1, wherein the signal receiving circuit comprises a diode D1, the anode of the diode D1 is connected to the facial image information output by the image pickup device, the cathode of the diode D1 is connected to one end of a resistor R1, one end of a resistor R2, and the cathode of a diode D2, the anode of the diode D1 is connected to one end of a resistor R3, one end of a resistor R4, one end of a capacitor C1, and the base of a transistor Q3, the other end of the resistor R1 is connected to +1V, the other end of the resistor R3 is connected to-1V, the other end of the resistor R2, the other end of the capacitor C1 are connected to ground, the emitter of a transistor Q3 is connected to ground through the resistor R5, the collector of the transistor Q3 is connected to the emitter of a transistor Q1, the emitter of the transistor Q2, the base of the transistor Q1 is connected to one end of the resistor R8, One end of a grounding capacitor C14, the other end of a resistor R8 are respectively connected with one end of a grounding resistor R7 and one end of a resistor R6, the collector of a triode Q1 is connected with one end of a resistor R9, the collector of a triode Q2 is connected with one end of a resistor R10, the other end of the resistor R6, the other end of a resistor R9 and the other end of the resistor R10 are connected with +1V, and the base of a triode Q2 is connected with one end of the grounding capacitor C2.
4. The human face image recognition information adjusting circuit as claimed in claim 1, wherein the follower output circuit comprises a resistor R38, one end of the resistor R38 is connected to the anode of the diode D5, the other end of the resistor R38 is connected to one end of the resistor R37, one end of the ground resistor R39, one end of the ground capacitor C13, and the gate of the MOS transistor T1, the drain of the MOS transistor T1 is connected to one end of the resistor R40, the source of the MOS transistor T1 is connected to the collector of the transistor Q8 and the subsequent circuit, the base of the transistor Q8 is connected to one end of the resistor R41 and one end of the ground resistor R43, the emitter of the transistor Q8 is connected to one end of the ground resistor R42, and the other end of the resistor R37 and the other end of the resistor R40 are connected to the power supply.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010070070.XA CN111147035A (en) | 2020-01-21 | 2020-01-21 | Face image recognition information regulating circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010070070.XA CN111147035A (en) | 2020-01-21 | 2020-01-21 | Face image recognition information regulating circuit |
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| CN111147035A true CN111147035A (en) | 2020-05-12 |
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| CN202010070070.XA Withdrawn CN111147035A (en) | 2020-01-21 | 2020-01-21 | Face image recognition information regulating circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113109620A (en) * | 2021-03-03 | 2021-07-13 | 昆明理工大学 | Power measurement circuit of high-power radio frequency signal |
| CN116614730A (en) * | 2023-07-21 | 2023-08-18 | 乾坤环保股份有限公司 | Distributed data acquisition module and monitoring system for hydraulic engineering environment monitoring |
| CN116961640A (en) * | 2023-09-19 | 2023-10-27 | 奉加微电子（昆山）有限公司 | Half-duplex differential interface circuit for isolator and isolator |
-
2020
- 2020-01-21 CN CN202010070070.XA patent/CN111147035A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113109620A (en) * | 2021-03-03 | 2021-07-13 | 昆明理工大学 | Power measurement circuit of high-power radio frequency signal |
| CN116614730A (en) * | 2023-07-21 | 2023-08-18 | 乾坤环保股份有限公司 | Distributed data acquisition module and monitoring system for hydraulic engineering environment monitoring |
| CN116614730B (en) * | 2023-07-21 | 2023-09-22 | 乾坤环保股份有限公司 | Distributed data acquisition module and monitoring system for hydraulic engineering environment monitoring |
| CN116961640A (en) * | 2023-09-19 | 2023-10-27 | 奉加微电子（昆山）有限公司 | Half-duplex differential interface circuit for isolator and isolator |
| CN116961640B (en) * | 2023-09-19 | 2023-12-01 | 奉加微电子（昆山）有限公司 | Half-duplex differential interface circuit for isolator and isolator |
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Application publication date: 20200512 |