CN205080460U - Voltage output device - Google Patents
Voltage output device Download PDFInfo
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- CN205080460U CN205080460U CN201520435389.2U CN201520435389U CN205080460U CN 205080460 U CN205080460 U CN 205080460U CN 201520435389 U CN201520435389 U CN 201520435389U CN 205080460 U CN205080460 U CN 205080460U
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- comparer
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- potential
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- 230000005611 electricity Effects 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model provides a voltage output device, wherein, the device includes: first loop circuit, second loop circuit and third loop circuit, wherein, second loop circuit include the rail to the rail comparator, penetrate along with the ware, first loop circuit produces the rail is to the mains voltage of rail comparator, third loop circuit produces the rail is to the input voltage of rail comparator, the rail uses to the rail comparator the rail to the mains voltage of rail comparator with the rail generates reference voltage to the input voltage of rail comparator, penetrate and use along with the ware reference voltage and bias current produce output voltage, output voltage is zero extremely arbitrary voltage among the mains voltage. The utility model discloses utilize the rail can guarantee to the rail comparator that voltage output device's output voltage adjusts to between the input voltage zero, the requirement of operation is wiped in the reading and writing that can satisfy flash memory chip's memory cell.
Description
Technical field
The utility model relates to electronic technology field, particularly relates to a kind of voltage output device.
Background technology
Read-write is carried out to the storage unit of flash chip inside and wipes operation, need the storage unit for flash chip inside to provide internal high pressure accurately.
Usually, the storage unit that voltage output device is flash chip inside is utilized to provide accurate high pressure.But the output voltage of traditional voltage output device can only regulate in a limited voltage regime, and the voltage range of the output voltage obtained is narrower, the requirement of operation is wiped in the read-write that can not meet the storage unit of flash chip inside.
Utility model content
The utility model provides a kind of voltage output device, narrower with the output voltage range solving traditional voltage output device, and the problem of the requirement of operation is wiped in the read-write that can not meet the storage unit of flash chip inside.
In order to solve the problem, the utility model provides a kind of voltage output device, comprising: the first loop circuit, the second loop circuit and Three links theory circuit;
Wherein, described second loop circuit comprises rail-to-rail comparer, emitter follower; Described first loop circuit produces the supply voltage of described rail-to-rail comparer; Described Three links theory circuit produces the input voltage of described rail-to-rail comparer; Described rail-to-rail comparer uses the supply voltage of described rail-to-rail comparer and the input voltage of described rail-to-rail comparer, generates reference voltage; Described emitter follower uses described reference voltage and bias current to produce output voltage; Described output voltage is zero to the arbitrary voltage in described supply voltage;
The input voltage of described rail-to-rail comparer comprises input voltage IN, input voltage INB, bias voltage VBIAS and high-tension electricity potential source HVSOURCE, wherein, and described input voltage IN and input voltage INB inversion signal each other.
Preferably, described first loop circuit comprises: charge pump and potential-divider network; Described Three links theory circuit comprises: voltage selects control module and described potential-divider network;
The local high pressure dividing potential drop that described voltage selects control module to be used for being exported by described charge pump by described potential-divider network is the first branch pressure voltage;
Wherein, described potential-divider network is resistor network or Diode series network; Described local high pressure is as the supply voltage of described rail-to-rail comparer; Described first branch pressure voltage is the arbitrary voltage between zero to described local high pressure.
Preferably, described first loop circuit also comprises: the first comparer;
Described first comparer is used for described first branch pressure voltage and reference voltage to compare, and obtains the first comparison signal;
Wherein, described first comparison signal is the inversion signal of the enable signal of described charge pump.
Preferably, described voltage selects the local high pressure dividing potential drop of control module also for being exported by described charge pump by described potential-divider network to be the second branch pressure voltage;
Wherein, described second branch pressure voltage is as the input voltage of described rail-to-rail comparer.
Preferably, described output voltage equals described second branch pressure voltage.
Compared with prior art, the utility model comprises following advantage:
Common comparer in traditional voltage output device is replaced by rail-to-rail comparer.The input range of rail-to-rail comparer is with being to power supply, output area also can from ground to power supply, so, the output voltage of voltage output device regulates between zero to input voltage to utilize rail-to-rail comparer to ensure, the requirement of operation is wiped in the read-write that can meet the storage unit of flash chip inside.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of voltage output device in the utility model embodiment one;
Fig. 2 is the structural representation of a kind of rail-to-rail comparer in the utility model embodiment one.
Embodiment
For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in further detail the utility model below in conjunction with the drawings and specific embodiments.
A kind of voltage output device that the utility model provides is introduced in detail below by enumerating several specific embodiment.
Embodiment one
The utility model embodiment one provides a kind of voltage output device.
With reference to Fig. 1, show the structural representation of a kind of voltage output device in the utility model embodiment one.
Described voltage output device can comprise three loop circuits, is respectively: the first loop circuit (loop 1), the second loop circuit (loop 2) and Three links theory circuit (loop 3).Can comprise two comparers in described three loop circuits, be respectively: comparer 1 and comparer 2, wherein, comparer 2 is arranged in described second loop circuit, and comparer 2 is rail-to-rail comparer.
The input voltage of rail-to-rail comparer allows from ground to supply voltage, and output voltage allows from ground to supply voltage.
Described second loop circuit, except comprising rail-to-rail comparer, can also comprise emitter follower.
Described first loop circuit can produce the supply voltage VH of described rail-to-rail comparer.
Described Three links theory circuit can produce the input voltage VOR of described rail-to-rail comparer.
Described rail-to-rail comparer can use the input voltage VOR of the supply voltage VH of described rail-to-rail comparer and described rail-to-rail comparer, generates reference voltage V REG.
Described emitter follower can use described reference voltage V REG and bias current Ibias to produce the output voltage VO UT of output voltage VO UT as described voltage output device; Described output voltage VO UT can be zero to the arbitrary voltage in described supply voltage VH.
Preferably, described first loop circuit can comprise: charge pump, potential-divider network and the first comparer (comparer 1).
Preferably, described Three links theory circuit can comprise: voltage selects control module and described potential-divider network.
I.e. described first loop circuit and the public described potential-divider network of described second loop circuit.
Wherein, the local high pressure VH dividing potential drop that described voltage selects control module to may be used for being exported by described charge pump by described potential-divider network is the first branch pressure voltage VDIV.
Preferably, described potential-divider network can be resistor network or Diode series network; Described local high pressure VH can as the supply voltage VH of described rail-to-rail comparer; Described first branch pressure voltage VDIV can be the arbitrary voltage between zero to described local high pressure VH.
Preferably, described first comparer may be used for described first branch pressure voltage VDIV and reference voltage VREF to compare, and obtains the first comparison signal ENB.
Wherein, described first comparison signal ENB can be the inversion signal of the enable signal EN of described charge pump.
Preferably, the local high pressure VH dividing potential drop that described voltage selects control module can also be used for being exported by described charge pump by described potential-divider network is the second branch pressure voltage VOR.
Wherein, described second branch pressure voltage VOR can as the input voltage of described rail-to-rail comparer.
Preferably, described output voltage VO UT can equal described second branch pressure voltage VOR.
Above-mentioned first branch pressure voltage VDIV is that potential-divider network can be realized by resistor network, also can be realized by method for distinguishing, such as Diode series etc. by above-mentioned local high pressure VH dividing potential drop gained.Various voltages between potential-divider network can separate by 0 ~ VH, select control module to select a required voltage VDIV by voltage, this voltage VDIV determines the size of output voltage VO UT.Generate different output voltage VO UT to realize as VDIV output by selecting different voltage.
Reference voltage VREF can be a fixing reference voltage, is generally produced by band-gap reference.
CLK represents the clock signal needed for charge pump state.When the enable signal EN of charge pump is high level, charge pump, produces local high pressure VH at output terminal, and pushes electric current.When the enable signal EN of charge pump is low level, charge pump quits work, and the local high pressure VH of output maintains on large electric capacity of voltage regulation C1, and is slowly leaked electricity by potential-divider network, thus slowly reduces.
When local high pressure VH is lower than preset value, first branch pressure voltage VDIV is lower than reference voltage VREF, and the first comparison signal ENB is low level, and the enable signal EN of charge pump is the inversion signal of the first comparison signal ENB, be now high level, charge pump is in running order; When local high pressure VH is higher than preset value, the first branch pressure voltage VDIV is higher than reference voltage VREF, and the first comparison signal ENB is high level, and the enable signal EN of charge pump is low level, and charge pump quits work, and local high pressure VH is stabilized in preset value.
Wherein, it is emphasized that:
1, the voltage that charge pump directly exports is not final output voltage, but as a local high pressure, called after VH.
2, because local high pressure VH is not final output voltage, a just local high pressure, so large electric capacity of voltage regulation C1 can adjust according to actual needs.
3, potential-divider network also needs output second branch pressure voltage VOR except output first branch pressure voltage VDIV, and the second branch pressure voltage VOR selects control module to select to produce from numerous voltages that potential-divider network exports by voltage.
Output voltage VO UT can be produced by an emitter follower.By loop 2 and loop 3, output voltage VO UT is made to equal the second branch pressure voltage VOR.Second branch pressure voltage VOR is the voltage that a ripple is larger, by adjusting the bandwidth of comparer 2, can obtain the voltage VREG that ripple is less, thus the ripple controlling output voltage VO UT is a very little scope.Wherein, exporting buffer capacitor C2 can set according to actual conditions, does not need very large.
Described voltage output device can be regulated by the voltage of comparer 2 couples of output voltage VO UT.
The structural representation of described comparer 2 as shown in Figure 2.Wherein, the input voltage IN of described comparer 2 and input voltage INB inversion signal each other, the input voltage of described comparer 2 also comprises bias voltage VBIAS and high-tension electricity potential source HVSOURCE, and the output voltage of described comparer 2 is voltage VOUT.
The voltage span of output voltage VO UT can be the arbitrary magnitude of voltage between zero to high-tension electricity potential source HVSOURCE.
In sum, the common comparer in traditional voltage output device is replaced by rail-to-rail comparer by the technical scheme in the utility model embodiment.The input range of rail-to-rail comparer is with being to power supply, output area also can from ground to power supply, so, the output voltage of voltage output device regulates between zero to input voltage to utilize rail-to-rail comparer to ensure, the requirement of operation is wiped in the read-write that can meet the storage unit of flash chip inside.
Those skilled in the art also should know, the embodiment described in instructions all belongs to preferred embodiment, and involved action and module might not be that the utility model is necessary.
Each embodiment in this instructions all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.
Above to a kind of voltage output device that the utility model embodiment provides, be described in detail, apply specific case herein to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands core concept of the present utility model for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (5)
1. a voltage output device, is characterized in that, comprising: the first loop circuit, the second loop circuit and Three links theory circuit;
Wherein, described second loop circuit comprises rail-to-rail comparer, emitter follower; Described first loop circuit produces the supply voltage of described rail-to-rail comparer; Described Three links theory circuit produces the input voltage of described rail-to-rail comparer; Described rail-to-rail comparer uses the supply voltage of described rail-to-rail comparer and the input voltage of described rail-to-rail comparer, generates reference voltage; Described emitter follower uses described reference voltage and bias current to produce output voltage; Described output voltage is zero to the arbitrary voltage in described supply voltage;
The input voltage of described rail-to-rail comparer comprises input voltage IN, input voltage INB, bias voltage VBIAS and high-tension electricity potential source HVSOURCE, wherein, and described input voltage IN and input voltage INB inversion signal each other.
2. device according to claim 1, is characterized in that, described first loop circuit comprises: charge pump and potential-divider network; Described Three links theory circuit comprises: voltage selects control module and described potential-divider network;
The local high pressure dividing potential drop that described voltage selects control module to be used for being exported by described charge pump by described potential-divider network is the first branch pressure voltage;
Wherein, described potential-divider network is resistor network or Diode series network; Described local high pressure is as the supply voltage of described rail-to-rail comparer; Described first branch pressure voltage is the arbitrary voltage between zero to described local high pressure.
3. device according to claim 2, is characterized in that, described first loop circuit also comprises: the first comparer;
Described first comparer is used for described first branch pressure voltage and reference voltage to compare, and obtains the first comparison signal;
Wherein, described first comparison signal is the inversion signal of the enable signal of described charge pump.
4. device according to claim 2, is characterized in that, described voltage selects the local high pressure dividing potential drop of control module also for being exported by described charge pump by described potential-divider network to be the second branch pressure voltage;
Wherein, described second branch pressure voltage is as the input voltage of described rail-to-rail comparer.
5. device according to claim 4, is characterized in that, described output voltage equals described second branch pressure voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520435389.2U CN205080460U (en) | 2015-06-23 | 2015-06-23 | Voltage output device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520435389.2U CN205080460U (en) | 2015-06-23 | 2015-06-23 | Voltage output device |
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| CN205080460U true CN205080460U (en) | 2016-03-09 |
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| CN201520435389.2U Active CN205080460U (en) | 2015-06-23 | 2015-06-23 | Voltage output device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109872758A (en) * | 2019-01-08 | 2019-06-11 | 上海华虹宏力半导体制造有限公司 | The reliability lifting device and method of NVM |
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- 2015-06-23 CN CN201520435389.2U patent/CN205080460U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109872758A (en) * | 2019-01-08 | 2019-06-11 | 上海华虹宏力半导体制造有限公司 | The reliability lifting device and method of NVM |
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Address after: Room 101, Floor 1-5, Building 8, Yard 9, Fenghao East Road, Haidian District, Beijing 100094 Patentee after: Zhaoyi Innovation Technology Group Co.,Ltd. Address before: 100083 12 Floors, Block A, Tiangong Building, Science and Technology University, 30 College Road, Haidian District, Beijing Patentee before: GIGADEVICE SEMICONDUCTOR(BEIJING) Inc. |