CN105116951B - A kind of voltage output method and apparatus - Google Patents
A kind of voltage output method and apparatus Download PDFInfo
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- CN105116951B CN105116951B CN201510351565.9A CN201510351565A CN105116951B CN 105116951 B CN105116951 B CN 105116951B CN 201510351565 A CN201510351565 A CN 201510351565A CN 105116951 B CN105116951 B CN 105116951B
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Abstract
The invention provides a kind of voltage output method and apparatus, wherein, described device includes：First loop circuit, the second loop circuit and Three links theory circuit；Wherein, second loop circuit includes rail-to-rail comparator, emitter follower；First loop circuit produces the supply voltage of the rail-to-rail comparator；The Three links theory circuit produces the input voltage of the rail-to-rail comparator；The rail-to-rail comparator generates reference voltage using the supply voltage of the rail-to-rail comparator and the input voltage of the rail-to-rail comparator；The emitter follower produces output voltage using the reference voltage and bias current；The output voltage is any voltage in zero to the supply voltage.The present invention can ensure that the output voltage of voltage output device is adjusted zero between input voltage using rail-to-rail comparator, disclosure satisfy that the requirement of operation is wiped in the read-write of the memory cell inside flash chip.
Description
Technical field
The present invention relates to electronic technology field, more particularly to a kind of voltage output method and apparatus.
Background technology
Wiping operation is written and read to the memory cell inside flash chip, it is necessary to for the memory cell inside flash chip is carried
For accurately internal high pressure.
Generally, using voltage output device for the memory cell inside flash chip provides accurate high pressure.But traditional electricity
The output voltage of pressure output device can only be adjusted in a limited voltage regime, the voltage model of the output voltage for obtaining
Enclose narrower, it is impossible to which the requirement of operation is wiped in the read-write for meeting the memory cell inside flash chip.
The content of the invention
The present invention provides a kind of voltage output method and apparatus, to solve the output voltage model of traditional voltage output device
Enclose narrower, it is impossible to which the problem of the requirement for operating is wiped in the read-write for meeting the memory cell inside flash chip.
In order to solve the above problems, the invention provides a kind of voltage output device, including：First loop circuit, second
Loop circuit and Three links theory circuit；
Wherein, second loop circuit includes rail-to-rail comparator, emitter follower；First loop circuit produces described
The supply voltage of rail-to-rail comparator；The Three links theory circuit produces the input voltage of the rail-to-rail comparator；The rail
To rail comparator using the supply voltage of the rail-to-rail comparator and the input voltage of the rail-to-rail comparator, benchmark is generated
Voltage；The emitter follower produces output voltage using the reference voltage and bias current；The output voltage is zero to described
Any voltage in supply voltage.
Preferably, first loop circuit includes：Charge pump and potential-divider network；The Three links theory circuit includes：Electricity
Pressure selection control module and the potential-divider network；
The voltage selection control module is used for the local high pressure point for exporting the charge pump by the potential-divider network
It is the first branch pressure voltage to press；
Wherein, the potential-divider network is resistor network or Diode series network；The local high pressure is arrived as the rail
The supply voltage of rail comparator；First branch pressure voltage is zero to any voltage between the local high pressure.
Preferably, first loop circuit also includes：First comparator；
The first comparator is used to be compared first branch pressure voltage with reference voltage, obtains first and compares letter
Number；
Wherein, first comparison signal is the inversion signal of the enable signal of the charge pump.
Preferably, the voltage selection control module is additionally operable to the sheet for exporting the charge pump by the potential-divider network
Ground high pressure partial pressure is the second branch pressure voltage；
Wherein, second branch pressure voltage as the rail-to-rail comparator input voltage.
Preferably, the output voltage is equal to second branch pressure voltage.
Correspondingly, present invention also offers a kind of voltage output method, methods described be applied to include the first loop circuit,
The voltage regulating device of the second loop circuit and Three links theory circuit；Wherein, second loop circuit includes rail-to-rail comparing
Device, emitter follower；Methods described includes：
The supply voltage of the rail-to-rail comparator is produced using first loop circuit, and uses the Three links theory
The input voltage of rail-to-rail comparator described in circuit evolving；
Use the rail-to-rail comparator and the supply voltage and the rail-to-rail comparator of the rail-to-rail comparator
Input voltage, generate reference voltage；
Output voltage is produced using the reference voltage, the emitter follower and bias current；
Wherein, the output voltage is any voltage in zero to the supply voltage.
Preferably, first loop circuit includes：Charge pump and potential-divider network；The Three links theory circuit includes：Institute
State potential-divider network；Methods described also includes：
The local high pressure partial pressure for being exported the charge pump using the potential-divider network is the first branch pressure voltage；
Wherein, the potential-divider network is resistor network or Diode series network；The local high pressure is arrived as the rail
The supply voltage of rail comparator；First branch pressure voltage is zero to any voltage between the local high pressure.
Preferably, first loop circuit also includes：First comparator；Methods described also includes：
First branch pressure voltage is compared with reference voltage using the first comparator, is obtained first and is compared letter
Number；
By the anti-phase enable signal for obtaining the charge pump of first comparison signal.
Preferably, methods described also includes：The local high pressure partial pressure for being exported the charge pump using the potential-divider network
It is the second branch pressure voltage；
Wherein, second branch pressure voltage as the rail-to-rail comparator input voltage.
Preferably, the output voltage is equal to second branch pressure voltage.
Compared with prior art, the present invention includes advantages below：
Common comparator in traditional voltage output device is replaced by rail-to-rail comparator.Rail-to-rail comparator it is defeated
Enter scope and be to power supply, output area can also from ground to power supply, so, can ensure that voltage is defeated using rail-to-rail comparator
The output voltage for going out device is adjusted zero between input voltage, disclosure satisfy that the read-write of the memory cell inside flash chip is wiped
The requirement of operation.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the voltage output device in the embodiment of the present invention one；
Fig. 2 is the structural representation of a kind of rail-to-rail comparator in the embodiment of the present invention one；
The step of Fig. 3 is a kind of voltage output method in the embodiment of the present invention two flow chart；
The step of Fig. 4 is a kind of voltage output method in the embodiment of the present invention three flow chart.
Specific embodiment
It is below in conjunction with the accompanying drawings and specific real to enable the above objects, features and advantages of the present invention more obvious understandable
The present invention is further detailed explanation to apply mode.
A kind of voltage output device and the side that the present invention is provided is discussed in detail below by several specific embodiments are enumerated
Method.
Embodiment one
The embodiment of the present invention one provides a kind of voltage output device.
Reference picture 1, shows a kind of structural representation of the voltage output device in the embodiment of the present invention one.
The voltage output device can include three loop circuits, respectively：First loop circuit (loop 1), second
Loop circuit (loop 2) and Three links theory circuit (loop 3).Two comparators can be included in three loop circuits, point
It is not：Comparator 1 and comparator 2, wherein, comparator 2 is located in second loop circuit, and comparator 2 is rail-to-rail comparing
Device.
The input voltage of rail-to-rail comparator is allowed from ground to supply voltage, and output voltage is allowed from ground to supply voltage.
Second loop circuit can also include emitter follower in addition to including rail-to-rail comparator.
First loop circuit can produce the supply voltage VH of the rail-to-rail comparator.
The Three links theory circuit can produce the input voltage VOR of the rail-to-rail comparator.
The rail-to-rail comparator can use the supply voltage VH of the rail-to-rail comparator and the rail-to-rail comparing
The input voltage VOR of device, generation reference voltage V REG.
The emitter follower can use the reference voltage V REG and bias current Ibias to produce output voltage VO UT conducts
The output voltage VO UT of the voltage output device；The output voltage VO UT can be appointing in zero to the supply voltage VH
One voltage.
Preferably, first loop circuit can include：Charge pump, potential-divider network and first comparator (comparator 1).
Preferably, the Three links theory circuit can include：Voltage selects control module and the potential-divider network.
I.e. described first loop circuit and the public potential-divider network of the Three links theory circuit.
Wherein, the voltage selection control module can be used for the sheet for exporting the charge pump by the potential-divider network
Ground high pressure VH partial pressures are the first branch pressure voltage VDIV.
Preferably, the potential-divider network can be resistor network or Diode series network；The local high pressure VH can be with
As the supply voltage VH of the rail-to-rail comparator；The first branch pressure voltage VDIV can be zero to the local high pressure VH
Between any voltage.
Preferably, the first comparator can be used for carrying out the first branch pressure voltage VDIV and reference voltage VREF
Compare, obtain the first comparison signal ENB.
Wherein, the first comparison signal ENB can be the inversion signal for enabling signal EN of the charge pump.
Preferably, the voltage selection control module can be also used for exporting the charge pump by the potential-divider network
Local high pressure VH partial pressures be the second branch pressure voltage VOR.
Wherein, the second branch pressure voltage VOR can be as the input voltage of the rail-to-rail comparator.
Preferably, the output voltage VO UT can be equal to the second branch pressure voltage VOR.
Above-mentioned first branch pressure voltage VDIV is that potential-divider network can be by resistor network by above-mentioned local high pressure VH partial pressures gained
Realize, it is also possible to realized by method for distinguishing, such as Diode series etc..Potential-divider network can be separated by various between 0~VH
Voltage, a required voltage VDIV is selected by voltage selection control module, and this voltage VDIV determines output voltage VO UT
Size.Generating different output voltage VO UT can be realized by selecting different voltages to be used as VDIV outputs.
Reference voltage VREF can be a fixed reference voltage, typically be produced by band-gap reference.
CLK represent charge pump state needed for clock signal.When the enable signal EN of charge pump is high level, electricity
Lotus pump work, produces local high pressure VH, and push electric current in output end.When the enable signal EN of charge pump is low level, electricity
Lotus pump is stopped, and the local high pressure VH of output is maintained on big electric capacity of voltage regulation C1, and is slowly leaked electricity by potential-divider network, so that
It is slow to reduce.
When local high pressure VH is less than preset value, the first branch pressure voltage VDIV is less than reference voltage VREF, and first compares letter
Number ENB is low level, and the enable signal EN of charge pump is the inversion signal of the first comparison signal ENB, is now high level, electric 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, first
Comparison signal ENB is high level, and the enable signal EN of charge pump is low level, and charge pump is stopped, local high pressure VH stabilizations
In preset value.
, wherein it is desired to it is emphasised that：
1st, the voltage that charge pump is directly exported is not final output voltage, but as a local high pressure, is named as
VH。
2nd, because local high pressure VH is not final output voltage, a simply local high pressure, so big electric capacity of voltage regulation C1 can
To adjust according to actual needs.
3rd, potential-divider network also needs to export a second branch pressure voltage VOR in addition to the first branch pressure voltage VDIV is exported, the
Two branch pressure voltage VOR are selected to produce by voltage selection control module from numerous voltages that potential-divider network is exported.
Output voltage VO UT can be produced by an emitter follower.By loop 2 and loop 3, it is equal to output voltage VO UT
Second branch pressure voltage VOR.Second branch pressure voltage VOR be a ripple than larger voltage, by adjusting the bandwidth of comparator 2,
The less voltage VREG of ripple can be obtained, so that the ripple of controlled output voltage VOUT is in a scope for very little.Wherein, it is defeated
Going out to buffer electric capacity C2 can set according to actual conditions, it is not necessary to very big.
The voltage output device can be adjusted by comparator 2 to the voltage of output voltage VO UT.
The structural representation of the comparator 2 is as shown in Figure 2.Wherein, the input voltage IN of the comparator 2 and input electricity
Pressing the input voltage of INB inversion signals each other, the comparator 2 also includes bias voltage VBIAS and high-tension electricity potential source HV
SOURCE, the output voltage of the comparator 2 is voltage VOUT.
The voltage span of output voltage VO UT can be any voltage between zero to high-tension electricity potential source HV SOURCE
Value.
In sum, the technical scheme in the embodiment of the present invention by the common comparator in traditional voltage output device more
It is changed to rail-to-rail comparator.The input range of rail-to-rail comparator be to power supply, output area can also be from ground to power supply, institute
So that the output voltage that can ensure voltage output device using rail-to-rail comparator is adjusted zero between input voltage, can
The requirement of operation is wiped in the read-write for meeting the memory cell inside flash chip.
Embodiment two
A kind of voltage output method provided in an embodiment of the present invention is discussed in detail.
Methods described can apply to include that the voltage of the first loop circuit, the second loop circuit and Three links theory circuit is adjusted
Regulating device；Wherein, second loop circuit can include rail-to-rail comparator, emitter follower.
Reference picture 3, flow chart the step of show a kind of voltage output method in the embodiment of the present invention two.
Step 200, the supply voltage of the rail-to-rail comparator is produced using first loop circuit, and using described
The input voltage of rail-to-rail comparator described in Three links theory circuit evolving.
The input voltage of rail-to-rail comparator is allowed from ground to supply voltage, and output voltage is allowed from ground to supply voltage.
Step 202, is arrived using the supply voltage and the rail of the rail-to-rail comparator and the rail-to-rail comparator
The input voltage of rail comparator, generates reference voltage.
Apply supply voltage by the rail-to-rail comparator, according to two of rail-to-rail comparator inputs
Voltage, reference voltage can be generated by the comparing operation of rail-to-rail comparator.
Step 204, output voltage is produced using the reference voltage, the emitter follower and bias current.
Wherein, the output voltage can be any voltage in zero to the supply voltage.
In sum, the technical scheme in the embodiment of the present invention by the common comparator in traditional voltage output device more
It is changed to rail-to-rail comparator.The input range of rail-to-rail comparator be to power supply, output area can also be from ground to power supply, institute
So that the output voltage that can ensure voltage output device using rail-to-rail comparator is adjusted zero between input voltage, can
The requirement of operation is wiped in the read-write for meeting the memory cell inside flash chip.
Embodiment three
A kind of voltage output method provided in an embodiment of the present invention is discussed in detail.
Methods described can apply to include that the voltage of the first loop circuit, the second loop circuit and Three links theory circuit is adjusted
Regulating device；Wherein, first loop circuit can include：First comparator, charge pump and potential-divider network.Second loop
Circuit can include：Rail-to-rail comparator, emitter follower.The Three links theory circuit includes：The potential-divider network.
Reference picture 4, flow chart the step of show a kind of voltage output method in the embodiment of the present invention three.
Step 300, the local high pressure partial pressure for being exported the charge pump using the potential-divider network is the first branch pressure voltage
With the second branch pressure voltage.
Wherein, the potential-divider network can be resistor network or Diode series network；The local high pressure can be as
The supply voltage of the rail-to-rail comparator；First branch pressure voltage can be zero to any electricity between the local high pressure
Pressure；Second branch pressure voltage can be as the input voltage of the rail-to-rail comparator.
, with reference voltage be compared first branch pressure voltage using the first comparator by step 302, obtains
One comparison signal.
Step 304, by the anti-phase enable signal for obtaining the charge pump of first comparison signal.
Step 306, the supply voltage of the rail-to-rail comparator is produced using first loop circuit, and using described
The input voltage of rail-to-rail comparator described in Three links theory circuit evolving.
The input voltage of rail-to-rail comparator is allowed from ground to supply voltage, and output voltage is allowed from ground to supply voltage.
Step 308, is arrived using the supply voltage and the rail of the rail-to-rail comparator and the rail-to-rail comparator
The input voltage of rail comparator, generates reference voltage.
Apply supply voltage by the rail-to-rail comparator, according to two of rail-to-rail comparator inputs
Voltage, reference voltage can be generated by the comparing operation of rail-to-rail comparator.
Step 310, output voltage is produced using the reference voltage, the emitter follower and bias current.
Wherein, the output voltage can be any voltage in zero to the supply voltage.
Preferably, the output voltage can be equal to second branch pressure voltage.
It should be noted that above-mentioned steps 300 to step 304 can be performed before above-mentioned steps 306, it is also possible in institute
Any time for stating method performs.Numbering between above-mentioned steps is only intended to convenient statement and understands.
In sum, the technical scheme in the embodiment of the present invention by the common comparator in traditional voltage output device more
It is changed to rail-to-rail comparator.The input range of rail-to-rail comparator be to power supply, output area can also be from ground to power supply, institute
So that the output voltage that can ensure voltage output device using rail-to-rail comparator is adjusted zero between input voltage, can
The requirement of operation is wiped in the read-write for meeting the memory cell inside flash chip.
For embodiment of the method, because it is substantially similar to device embodiment, so description is fairly simple, it is related
Part is illustrated referring to the part of device embodiment.
For foregoing embodiment of the method, in order to be briefly described, therefore it is all expressed as a series of combination of actions, but
Those skilled in the art should know that the present invention is not limited by described sequence of movement, because according to the present invention, some
Step can sequentially or simultaneously be carried out using other.Secondly, those skilled in the art should also know, described in the specification
Embodiment belong to preferred embodiment, necessary to involved action and the module not necessarily present invention.
Each embodiment in this specification is described by the way of progressive, what each embodiment was stressed be with
The difference of other embodiment, between each embodiment identical similar part mutually referring to.
A kind of voltage output method and apparatus for being provided the embodiment of the present invention above, are described in detail, herein
In apply specific case principle of the invention and implementation method be set forth, the explanation of above example is only intended to side
Assistant solves the method for the present invention and its core concept；Simultaneously for those of ordinary skill in the art, according to think of of the invention
Think, will change in specific embodiments and applications, in sum, it is right that this specification content should not be construed as
Limitation of the invention.
Claims (8)
1. a kind of voltage output device, it is characterised in that including：First loop circuit, the second loop circuit and Three links theory electricity
Road；
Wherein, second loop circuit includes rail-to-rail comparator, emitter follower；First loop circuit produces the rail to arrive
The supply voltage of rail comparator；The Three links theory circuit produces the input voltage of the rail-to-rail comparator；It is described rail-to-rail
Comparator uses the supply voltage of the rail-to-rail comparator and the input voltage of the rail-to-rail comparator, generation benchmark electricity
Pressure；The emitter follower produces output voltage using the reference voltage and bias current；The output voltage is zero to the electricity
Any voltage in the voltage of source；
First loop circuit includes：Charge pump and potential-divider network；The Three links theory circuit includes：Voltage selection control mould
Block and the potential-divider network；The voltage selection control module is used for the sheet for exporting the charge pump by the potential-divider network
Ground high pressure partial pressure is the first branch pressure voltage；Wherein, the potential-divider network is resistor network or Diode series network；It is described local
High pressure as the rail-to-rail comparator supply voltage；First branch pressure voltage is zero to appointing between the local high pressure
One voltage.
2. device according to claim 1, it is characterised in that first loop circuit also includes：First comparator；
The first comparator is used to be compared first branch pressure voltage with reference voltage, obtains the first comparison signal；
Wherein, first comparison signal is the inversion signal of the enable signal of the charge pump.
3. device according to claim 1, it is characterised in that the voltage selection control module is additionally operable to by described point
The local high pressure partial pressure that pressure network network exports the charge pump is the second branch pressure voltage；
Wherein, second branch pressure voltage as the rail-to-rail comparator input voltage.
4. device according to claim 3, it is characterised in that the output voltage is equal to second branch pressure voltage.
5. a kind of voltage output method, it is characterised in that methods described is applied to include the first loop circuit, the second loop circuit
With the voltage regulating device of Three links theory circuit；Wherein, second loop circuit includes rail-to-rail comparator, emitter follower；Institute
The method of stating includes：
The supply voltage of the rail-to-rail comparator is produced using first loop circuit, and uses the Three links theory circuit
Generate the input voltage of the rail-to-rail comparator；
Using the rail-to-rail comparator and the rail-to-rail comparator supply voltage and the rail-to-rail comparator it is defeated
Enter voltage, generate reference voltage；
Output voltage is produced using the reference voltage, the emitter follower and bias current；
Wherein, the output voltage is any voltage in zero to the supply voltage；
Wherein, first loop circuit includes：Charge pump and potential-divider network；The Three links theory circuit includes：The partial pressure
Network；Methods described also includes：The local high pressure partial pressure for being exported the charge pump using the potential-divider network is the first partial pressure
Voltage；Wherein, the potential-divider network is resistor network or Diode series network；The local high pressure is used as the rail-to-rail ratio
Compared with the supply voltage of device；First branch pressure voltage is zero to any voltage between the local high pressure.
6. method according to claim 5, it is characterised in that first loop circuit also includes：First comparator；Institute
Stating method also includes：
First branch pressure voltage is compared with reference voltage using the first comparator, obtains the first comparison signal；
By the anti-phase enable signal for obtaining the charge pump of first comparison signal.
7. method according to claim 5, it is characterised in that methods described also includes：Using the potential-divider network by institute
The local high pressure partial pressure for stating charge pump output is the second branch pressure voltage；
Wherein, second branch pressure voltage as the rail-to-rail comparator input voltage.
8. method according to claim 7, it is characterised in that the output voltage is equal to second branch pressure voltage.
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| CN201510351565.9A CN105116951B (en) | 2015-06-23 | 2015-06-23 | A kind of voltage output method and apparatus |
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|---|---|---|---|
| CN201510351565.9A CN105116951B (en) | 2015-06-23 | 2015-06-23 | A kind of voltage output method and apparatus |
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| CN105116951A CN105116951A (en) | 2015-12-02 |
| CN105116951B true CN105116951B (en) | 2017-06-06 |
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| US6703815B2 (en) * | 2002-05-20 | 2004-03-09 | Texas Instruments Incorporated | Low drop-out regulator having current feedback amplifier and composite feedback loop |
| CN101364119A (en) * | 2008-07-07 | 2009-02-11 | 武汉大学 | Wide dynamic range and low voltage difference linear constant voltage regulator |
| CN101419479B (en) * | 2008-12-10 | 2012-05-23 | 武汉大学 | Low-voltage difference linear constant voltage regulator with novel structure |
| CN101893908B (en) * | 2010-07-08 | 2012-07-04 | 西安启芯微电子有限公司 | Filling in/pulling out current rapid response linear voltage regulator and regulating method |
| US8598861B2 (en) * | 2011-12-19 | 2013-12-03 | O2Micro Inc. | Circuit and method for providing a reference signal |
| US9281744B2 (en) * | 2012-04-30 | 2016-03-08 | Infineon Technologies Ag | System and method for a programmable voltage source |
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