CN105097038A - Voltage output method and apparatus - Google Patents
Voltage output method and apparatus Download PDFInfo
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- CN105097038A CN105097038A CN201510351597.9A CN201510351597A CN105097038A CN 105097038 A CN105097038 A CN 105097038A CN 201510351597 A CN201510351597 A CN 201510351597A CN 105097038 A CN105097038 A CN 105097038A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The present invention provides a voltage output method and apparatus, wherein the apparatus comprises: a first loop circuit, a second loop circuit, and a third loop circuit; wherein the second loop circuit comprises a second comparator and an emitter follower; the first loop circuit generates a supply voltage of the second comparator; the third loop circuit generates an input voltage of the second comparator; the second comparator generates a reference voltage by using the supply voltage of the second comparator and the input voltage of the second comparator; the emitter follower generates an output voltage by using the reference voltage and a bias current; and the output voltage is any voltage ranging from zero to the supply voltage. According to the technical solutions of the present invention, it can be ensured that the output voltage of a voltage output device is adjusted from zero to the input voltage, and a requirement of reading, writing and erasing operations of a memory unit inside a flash memory chip can be satisfied.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of voltage output intent and 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, as shown in Figure 1, be a kind of common high voltage system schematic diagram, mainly comprise charge pump, potential-divider network, large electric capacity of voltage regulation, comparer and voltage selection control module composition.Branch pressure voltage VDIV is that potential-divider network can be realized by resistor network, also can be realized by other forms, such as Diode series etc. by output high pressure VOUT through potential-divider network dividing potential drop gained.Various voltages between potential-divider network can separate by 0 ~ VOUT, select control module to select a branch pressure voltage VDIV needed by voltage, this branch pressure voltage determines the size of output voltage.Generate different output voltages to realize as VDIV output by selecting different voltage.
VREF is a fixing reference voltage, is generally produced by band-gap reference.
EN is the enable signal of charge pump, and CLK is the clock needed for charge pump state.When enable signal EN is high level, charge pump, produces high pressure VOUT at output terminal, and pushes electric current.When enable signal EN is low level, charge pump quits work, and exports high pressure VOUT and maintains on large electric capacity of voltage regulation, and slowly leaked electricity by potential-divider network, thus slowly reduce.
When exporting high pressure VOUT lower than certain preset value, branch pressure voltage VDIV is lower than reference voltage VREF, and signal ENB is low level, and enable signal EN is the inversion signal of signal ENB, and now enable signal EN is high level, and charge pump is in running order; When exporting high pressure VOUT higher than certain preset value, branch pressure voltage VDIV is higher than reference voltage VREF, and signal ENB is high level, and enable signal EN is low level, and charge pump quits work, and output voltage VO UT is stabilized in preset value.
Common high voltage system has following shortcoming:
1, very large electric capacity of voltage regulation is needed to reduce ripple.
2, the ripple that different output voltages is corresponding has very big difference, is difficult to control.Output voltage is higher, and ripple is less; Output voltage is less, and ripple is larger.
3, supply voltage is very large on ripple impact.Supply voltage is higher, and ripple is larger; Supply voltage is lower, and ripple is less.
4, when output voltage needs from higher voltage to lower voltage switching, speed is set up slowly.
In a word, the requirement operated is wiped in the read-write that traditional high voltage system can not meet the storage unit of flash chip inside.
Summary of the invention
The invention provides a kind of voltage output intent and device, to solve the problem that traditional high voltage system can not meet the requirement of the read-write wiping operation of the storage unit of flash chip inside.
In order to solve the problem, the invention 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 the second comparer, emitter follower; Described first loop circuit produces the supply voltage of described second comparer; Described Three links theory circuit produces the input voltage of described second comparer; Described second comparer uses the supply voltage of described second comparer and the input voltage of described second 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.
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 second 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 second comparer.
Preferably, described output voltage equals described second branch pressure voltage.
Correspondingly, present invention also offers a kind of voltage output intent, described method is applied to the voltage regulating device comprising the first loop circuit, the second loop circuit and Three links theory circuit; Wherein, described second loop circuit comprises the second comparer, emitter follower; Described method comprises:
Use described first loop circuit to produce the supply voltage of described second comparer, and use the input voltage of the second comparer described in described Three links theory circuit evolving;
Use the input voltage of the supply voltage of described second comparer and described second comparer and described second comparer, generate reference voltage;
Described reference voltage, described emitter follower and bias current is used to produce output voltage;
Wherein, described output voltage is zero to the arbitrary voltage in described supply voltage.
Preferably, described first loop circuit comprises: charge pump and potential-divider network; Described Three links theory circuit comprises: described potential-divider network; Described method also comprises:
The local high pressure dividing potential drop using described potential-divider network to be exported by described charge pump 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 second 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 method also comprises:
Use described first comparer described first branch pressure voltage and reference voltage to be compared, obtain the first comparison signal;
By anti-phase for the described first comparison signal enable signal obtaining described charge pump.
Preferably, described method also comprises: the local high pressure dividing potential drop using described potential-divider network to be exported by described charge pump is the second branch pressure voltage;
Wherein, described second branch pressure voltage is as the input voltage of described second comparer.
Preferably, described output voltage equals described second branch pressure voltage.
Compared with prior art, the present invention includes following advantage:
In traditional voltage output device, increase the second loop and Three links theory, the second loop circuit comprises the second comparer, emitter follower; The output high pressure of charge pump is as the supply voltage of the second comparer; Three links theory circuit produces the input voltage of the second comparer; Second comparer uses supply voltage and input voltage, generates reference voltage; Emitter follower uses reference voltage and bias current to produce output voltage; The output voltage obtained is the arbitrary voltage in zero to supply voltage.Can ensure that the output voltage of voltage output device regulates between zero to input voltage, 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 a kind of high voltage system schematic diagram in background technology;
Fig. 2 is the structural representation of a kind of voltage output device in the embodiment of the present invention one;
Fig. 3 is the flow chart of steps of a kind of voltage output intent in the embodiment of the present invention two;
Fig. 4 is the flow chart of steps of a kind of voltage output intent in the embodiment of the present invention three.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
A kind of voltage output device provided by the invention and method is introduced in detail below by enumerating several specific embodiment.
Embodiment one
The embodiment of the present invention one provides a kind of voltage output device.
With reference to Fig. 2, show the structural representation of a kind of voltage output device in the embodiment of the present invention 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).Two comparers can be comprised in described three loop circuits, be respectively: the first comparer (comparer 1) and the second comparer (comparer 2), wherein, comparer 1 is arranged in the first loop circuit, and comparer 2 is arranged in described second loop circuit.
The input voltage of comparer 2 allows from ground to supply voltage, and output voltage allows from ground to supply voltage.
Described second loop circuit, except comprising comparer 2, can also comprise emitter follower.
Described first loop circuit can produce the supply voltage VH of described comparer 2.
Described Three links theory circuit can produce the input voltage VOR of described comparer 2.
Described comparer 2 can use the supply voltage VH of described the comparer 2 and input voltage VOR of described comparer 2, 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 comparer 2; 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 comparer 2.
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 embodiment of the present invention has the following advantages:
The consistance of the ripple of 1, all output voltages is all relatively good.
2, output voltage ripple is smaller by power supply voltage influence.
3, do not need especially big electric capacity in output terminal voltage stabilizing, can saving chip area.
4, because output capacitance is smaller, when output voltage switches from high to low, speed of setting up also improves a lot.
In sum, the technical scheme in the embodiment of the present invention increases the second loop and Three links theory in traditional voltage output device, and the second loop circuit comprises the second comparer, emitter follower; The output high pressure of charge pump is as the supply voltage of the second comparer; Three links theory circuit produces the input voltage of the second comparer; Second comparer uses supply voltage and input voltage, generates reference voltage; Emitter follower uses reference voltage and bias current to produce output voltage; The output voltage obtained is the arbitrary voltage in zero to supply voltage.Can ensure that the output voltage of voltage output device regulates between zero to input voltage, the requirement of operation is wiped in the read-write that can meet the storage unit of flash chip inside.
Embodiment two
Introduce a kind of voltage output intent that the embodiment of the present invention provides in detail.
Described method can be applied to the voltage regulating device comprising the first loop circuit, the second loop circuit and Three links theory circuit; Wherein, described second loop circuit can comprise the second comparer, emitter follower.
With reference to Fig. 3, show the flow chart of steps of a kind of voltage output intent in the embodiment of the present invention two.
Step 200, uses described first loop circuit to produce the supply voltage of described second comparer, and uses the input voltage of the second comparer described in described Three links theory circuit evolving.
The input voltage of described second comparer allows from ground to supply voltage, and output voltage allows from ground to supply voltage.
Step 202, uses the input voltage of the supply voltage of described second comparer and described second comparer and described second comparer, generates reference voltage.
By applying supply voltage on described second comparer, at two input voltages according to described second comparer, the compare operation through the second comparer can generate reference voltage.
Step 204, uses described reference voltage, described emitter follower and bias current to produce output voltage.
Wherein, described output voltage can be zero to the arbitrary voltage in described supply voltage.
In sum, the technical scheme in the embodiment of the present invention increases the second loop and Three links theory in traditional voltage output device, and the second loop circuit comprises the second comparer, emitter follower; The output high pressure of charge pump is as the supply voltage of the second comparer; Three links theory circuit produces the input voltage of the second comparer; Second comparer uses supply voltage and input voltage, generates reference voltage; Emitter follower uses reference voltage and bias current to produce output voltage; The output voltage obtained is the arbitrary voltage in zero to supply voltage.Can ensure that the output voltage of voltage output device regulates between zero to input voltage, the requirement of operation is wiped in the read-write that can meet the storage unit of flash chip inside.
Embodiment three
Introduce a kind of voltage output intent that the embodiment of the present invention provides in detail.
Described method can be applied to the voltage regulating device comprising the first loop circuit, the second loop circuit and Three links theory circuit; Wherein, described first loop circuit can comprise: the first comparer, charge pump and potential-divider network.Described second loop circuit can comprise: the second comparer, emitter follower.Described Three links theory circuit comprises: described potential-divider network.
With reference to Fig. 4, show the flow chart of steps of a kind of voltage output intent in the embodiment of the present invention three.
Step 300, the local high pressure dividing potential drop using described potential-divider network to be exported by described charge pump is the first branch pressure voltage and the second branch pressure voltage.
Wherein, described potential-divider network can be resistor network or Diode series network; Described local high pressure can as the supply voltage of described second comparer; Described first branch pressure voltage can be the arbitrary voltage between zero to described local high pressure; Described second branch pressure voltage can as the input voltage of described second comparer.
Step 302, uses described first comparer described first branch pressure voltage and reference voltage to be compared, obtains the first comparison signal.
Step 304, by anti-phase for the described first comparison signal enable signal obtaining described charge pump.
Step 306, uses described first loop circuit to produce the supply voltage of described second comparer, and uses the input voltage of the second comparer described in described Three links theory circuit evolving.
The input voltage of described second comparer allows from ground to supply voltage, and output voltage allows from ground to supply voltage.
Step 308, uses the input voltage of the supply voltage of described second comparer and described second comparer and described second comparer, generates reference voltage.
By applying supply voltage on described second comparer, at two input voltages according to described second comparer, the compare operation through the second comparer can generate reference voltage.
Step 310, uses described reference voltage, described emitter follower and bias current to produce output voltage.
Wherein, described output voltage can be zero to the arbitrary voltage in described supply voltage.
Preferably, described output voltage can equal described second branch pressure voltage.
It should be noted that, above-mentioned steps 300 to step 304 can perform before above-mentioned steps 306, also can perform in any time of described method.Numbering between above-mentioned steps is just for convenient statement and understanding.
In sum, the technical scheme in the embodiment of the present invention increases the second loop and Three links theory in traditional voltage output device, and the second loop circuit comprises the second comparer, emitter follower; The output high pressure of charge pump is as the supply voltage of the second comparer; Three links theory circuit produces the input voltage of the second comparer; Second comparer uses supply voltage and input voltage, generates reference voltage; Emitter follower uses reference voltage and bias current to produce output voltage; The output voltage obtained is the arbitrary voltage in zero to supply voltage.Can ensure that the output voltage of voltage output device regulates between zero to input voltage, the requirement of operation is wiped in the read-write that can meet the storage unit of flash chip inside.
For embodiment of the method, due to itself and device embodiment basic simlarity, so description is fairly simple, relevant part illustrates see the part of device embodiment.
For aforesaid embodiment of the method, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, 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 present invention 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.
A kind of voltage the output intent above embodiment of the present invention provided and device, be described in detail, apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
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 the second comparer, emitter follower; Described first loop circuit produces the supply voltage of described second comparer; Described Three links theory circuit produces the input voltage of described second comparer; Described second comparer uses the supply voltage of described second comparer and the input voltage of described second 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.
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 second 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 second comparer.
5. device according to claim 4, is characterized in that, described output voltage equals described second branch pressure voltage.
6. a voltage output intent, is characterized in that, described method is applied to the voltage regulating device comprising the first loop circuit, the second loop circuit and Three links theory circuit; Wherein, described second loop circuit comprises the second comparer, emitter follower; Described method comprises:
Use described first loop circuit to produce the supply voltage of described second comparer, and use the input voltage of the second comparer described in described Three links theory circuit evolving;
Use the input voltage of the supply voltage of described second comparer and described second comparer and described second comparer, generate reference voltage;
Described reference voltage, described emitter follower and bias current is used to produce output voltage;
Wherein, described output voltage is zero to the arbitrary voltage in described supply voltage.
7. method according to claim 6, is characterized in that, described first loop circuit comprises: charge pump and potential-divider network; Described Three links theory circuit comprises: described potential-divider network; Described method also comprises:
The local high pressure dividing potential drop using described potential-divider network to be exported by described charge pump 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 second comparer; Described first branch pressure voltage is the arbitrary voltage between zero to described local high pressure.
8. method according to claim 7, is characterized in that, described first loop circuit also comprises: the first comparer; Described method also comprises:
Use described first comparer described first branch pressure voltage and reference voltage to be compared, obtain the first comparison signal;
By anti-phase for the described first comparison signal enable signal obtaining described charge pump.
9. method according to claim 7, is characterized in that, described method also comprises: the local high pressure dividing potential drop using described potential-divider network to be exported by described charge pump is the second branch pressure voltage;
Wherein, described second branch pressure voltage is as the input voltage of described second comparer.
10. method according to claim 9, is characterized in that, described output voltage equals described second branch pressure voltage.
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| CN110491436B (en) * | 2018-05-14 | 2021-05-18 | 华邦电子股份有限公司 | Semiconductor device with a plurality of semiconductor chips |
| CN108880231A (en) * | 2018-07-02 | 2018-11-23 | 华大半导体有限公司 | It is a kind of for adjusting the circuit of the output voltage of charge pump |
| CN111371312A (en) * | 2018-12-26 | 2020-07-03 | 北京兆易创新科技股份有限公司 | Voltage stabilizing circuit of charge pump |
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