CN102158076B - Charge pump output voltage regulation circuit - Google Patents
Charge pump output voltage regulation circuit Download PDFInfo
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- CN102158076B CN102158076B CN201110117361.0A CN201110117361A CN102158076B CN 102158076 B CN102158076 B CN 102158076B CN 201110117361 A CN201110117361 A CN 201110117361A CN 102158076 B CN102158076 B CN 102158076B
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Abstract
The present invention discloses a kind of charge pump output voltage regulation circuit, the input voltage of described charge pump is the driving voltage of change, this voltage regulator circuit comprises: filter circuit, its input is connected with described electric charge delivery side of pump, in order to the output voltage of described charge pump is carried out filtering, to produce filtering voltage and to export; Voltage stabilizing circuit, its input is connected with the output of described filter circuit, and in order to receive described filtering voltage, the output of described voltage stabilizing circuit exports fixed voltage.Owing to adopting voltage stabilizing circuit, by the filtering voltage produced after filter circuit filtering, voltage stabilizing is carried out to the output voltage of charge pump, export fixed voltage, thus meet the requirement of output voltage as program voltage.
Description
Technical field
The present invention relates to technical field of semiconductors, refer to a kind of output voltage regulation circuit for charge pump especially.
Background technology
Charge pump is a kind of capacitor voltage converter, be mainly used in lifting circuit voltage, because its circuit is simple and efficiency is higher, can be widely used in the integrated circuit of single power supply, can be such as the voltage signal that EEPROM (Electrically Erasable Programmable Read Only Memo) (EEPROM) or flash memory (Flash Memory) provide higher than supply power voltage, for the write operation of data.
As a rule, the required voltage exported of charge pump can higher than the voltage signal of supply power voltage, therefore often arrange output voltage regulation circuit by the output voltage clamper of charge pump in required value, this output voltage regulation circuit also can improve the stability of charge pump output voltage simultaneously.
In prior art, mainly contain the output voltage regulation circuit of two kinds of structures, a kind of is the mode of current feedback, and another kind is the mode of said current dumping.
Please refer to Fig. 1, Fig. 1 illustrates the output voltage regulation circuit of the charge pump into prior art.This regulating circuit is the mode of said current dumping, and this circuit comprises: charge pump 1, load 2, current source 3, transistor 4, adjuster 5.The output port of charge pump 1 is connected to the first end of load 2, and the second end of load 2 is connected to the first end of current source 3, the second end ground connection of current source 3; Source electrode and in drain electrode of transistor 4 are connected to output, another output port as regulating circuit (transistor 4 is P-MOS, and its drain electrode is connected to the output of charge pump 1) of charge pump 1 herein; Adjuster 5 first end is connected to the output port of described regulating circuit, and adjuster 5 second end is connected with described charge pump 1, disconnects the charging of described charge pump 1 in order to produce control signal.
Because charge pump 1 is as capacitive device, it is not continuous operation, but discharge and recharge repeatedly, therefore inevitably produce more serious ripple phenomenon.The ripple that charge pump 1 output voltage VH produces can cause the voltage oscillation that regulating circuit output voltage VPP produces then, the stability affecting circuit.The output port VPP of above-mentioned regulating circuit is subject to the impact of charge pump 1 output voltage VH; also ripple phenomenon can be produced in order to reduce the ripple on VPP; usual meeting load 2 the second end be connected filter capacitor 6 between ground, to eliminate the ripple of the output port VPP of regulating circuit.
But for above-mentioned charge pump 1, the voltage that its input voltage VDDQ can adopt system to supply usually, and the voltage of system supply, its value is normally in the scope of a change.Adopt the input of voltage as charge pump 1 of changing value, also a side-play amount can be there is in the value of the regulating circuit output voltage VPP of corresponding generation, the value of such as VDDQ is 2.7V ~ ~ 5.5V, needs the voltage VPP exported to be 7.6V, just likely produces the side-play amount of a 400mV.Because output voltage VPP is for programming, so the magnitude of voltage that needs one are stable.Visible, adopt the output voltage regulation circuit of the charge pump of prior art, the value of output voltage VPP can not meet the demands.
In view of this, be necessary to provide a kind of charge pump output voltage regulation circuit, to solve the problem in fact.
Summary of the invention
The problem that the present invention solves provides a kind of charge pump output voltage regulation circuit, to reach output voltage stabilization, thus meets the requirement of output voltage as program voltage.
For solving the problem, the invention provides a kind of charge pump output voltage regulation circuit, the input voltage of described charge pump is the driving voltage of change, and this voltage regulator circuit comprises:
Filter circuit, its input is connected with described electric charge delivery side of pump, in order to the output voltage of described charge pump is carried out filtering, to produce filtering voltage and to export;
Voltage stabilizing circuit, its input is connected with the output of described filter circuit, and in order to receive described filtering voltage, the output of described voltage stabilizing circuit exports fixed voltage.
Optionally, the input voltage of described charge pump is 2.7V ~ ~ 5.5V.
Optionally, described fixed voltage is 7.6V or 8V.
Optionally, described voltage stabilizing circuit comprises: voltage-stable transistor, and its source electrode is connected with the output of described filter circuit with in drain electrode, and another exports described fixed voltage as the output of described voltage stabilizing circuit; Voltage stabilizing charge pump, its input input fixed value voltage, output connects the grid of described voltage-stable transistor, and described voltage stabilizing electric charge delivery side of pump produces voltage of voltage regulation, and described voltage of voltage regulation is in order to the control voltage as described voltage-stable transistor grid; Wherein, the difference of the threshold voltage of described voltage of voltage regulation and described voltage-stable transistor is less than described filtering voltage, and the value of described fixed voltage equals the difference of the value of described voltage of voltage regulation and the threshold voltage of described voltage-stable transistor.
Optionally, described fixed value voltage is 1V, 1.2V, 1.5V or 1.8V.
Optionally, described voltage-stable transistor is P type field effect transistor, and its drain electrode is connected with the output of described filter circuit, and source electrode, as the output of described voltage stabilizing circuit, exports described fixed voltage.
Optionally, described voltage stabilizing circuit also comprises the first adjuster, described first adjuster first end connects described voltage stabilizing electric charge delivery side of pump, described first adjuster second end is connected with the control end of described voltage stabilizing charge pump, in order to when described voltage of voltage regulation is more than or equal to the first preset value, disconnect the charging of described voltage stabilizing charge pump, when described voltage of voltage regulation is less than described first preset value, the charging of closed described voltage stabilizing charge pump.
Optionally, described first adjuster comprises the first voltage divider and the first comparison circuit, described first voltage divider is connected with described voltage stabilizing electric charge delivery side of pump, and in order to receive described voltage of voltage regulation, the dividing potential drop of described voltage of voltage regulation being carried out the first multiple produces the first dividing potential drop; Described first comparison circuit is connected with described first voltage divider, and be connected with the control end of described voltage stabilizing charge pump, in order to described first dividing potential drop is compared with the first reference voltage, when described first dividing potential drop is more than or equal to described first reference voltage, disconnect the clock driver circuit of described voltage stabilizing charge pump or the driving force of described clock driver circuit is died down, when described first dividing potential drop is less than described first reference voltage, closes the clock driver circuit of described voltage stabilizing charge pump or make the driving force grow of described clock driver circuit; Wherein, described first reference voltage and the long-pending of described first multiple equal described first preset value.
Optionally, the scope of described first reference voltage is 0.5V ~ ~ 1.2V.
Optionally, described first adjuster is integrated in described voltage stabilizing charge pump.
Optionally, described first adjuster and described voltage stabilizing charge pump are independent component.
Optionally, described filter circuit comprises: load, and its first end is connected with described electric charge delivery side of pump; Filter capacitor, its one end is connected with the second end of described load, other end ground connection; Current source, its one end is connected with the second end of described load, other end ground connection; Filter crystal pipe, its grid is connected with the second end of described load, and the source electrode of described filter crystal pipe is connected with described electric charge delivery side of pump, for receiving the output voltage of described charge pump with in drain electrode, another exports described filtering voltage as the output of described filter circuit.
Optionally, described filter circuit comprises: load, and its first end is connected with described electric charge delivery side of pump; Filter capacitor, its one end is connected with described electric charge delivery side of pump, other end ground connection; Current source, its one end is connected with the second end of described load, other end ground connection; Filter crystal pipe, its grid is connected with the second end of described load, and the source electrode of described filter crystal pipe is connected with described electric charge delivery side of pump, for receiving the output voltage of described charge pump with in drain electrode, another exports described filtering voltage as the output of described filter circuit.
Optionally, described filter crystal pipe is P type field effect transistor, and its drain electrode is connected with described electric charge delivery side of pump, and source electrode, as the output of described filter circuit, exports described filtering voltage.
Optionally, described filter circuit also comprises the second adjuster, described second adjuster first end connects the output of described filter circuit, described second adjuster second end is connected with the control end of described charge pump, in order to when described filtering voltage is more than or equal to the second preset value, disconnect the charging of described charge pump, when described filtering voltage is less than described second preset value, the charging of closed described charge pump.
Optionally, described second adjuster comprises the second voltage divider and the second comparison circuit, and described second voltage divider is connected with the output of described filter circuit, and in order to receive described filtering voltage, the dividing potential drop of described filtering voltage being carried out the second multiple produces the second dividing potential drop; Described second comparison circuit is connected with described second voltage divider, and be connected with the control end of described charge pump, in order to described second dividing potential drop is compared with the second reference voltage, when described second dividing potential drop is more than or equal to described second reference voltage, disconnect the clock driver circuit of described charge pump or the driving force of described clock driver circuit is died down, when described second dividing potential drop is less than described second reference voltage, closes the clock driver circuit of described charge pump or make the driving force grow of described clock driver circuit; Wherein, described second reference voltage and the long-pending of described second multiple equal described second preset value.
Optionally, the scope of described second reference voltage is 0.5V ~ ~ 1.2V.
Optionally, described second adjuster is integrated in described charge pump.
Optionally, described second adjuster and described charge pump are independent component.
Optionally, described load is any one in resistance, transistor, diode, triode.
Compared with prior art, adopt charge pump output voltage regulation circuit of the present invention, have the following advantages:
1. owing to adopting voltage stabilizing circuit, by the filtering voltage produced after filter circuit filtering, voltage stabilizing is carried out to the output voltage of charge pump, export fixed voltage, thus meet the requirement of output voltage as program voltage.
2. in one embodiment of the invention, described voltage stabilizing circuit comprises: voltage-stable transistor, voltage stabilizing charge pump; The grid of voltage-stable transistor is controlled by the voltage of voltage regulation of voltage stabilizing charge pump output; The source electrode of voltage-stable transistor and a described filtering voltage of acceptance in draining, another is as the output of described voltage stabilizing circuit; Due to the difference of described first preset value of the described voltage of voltage regulation of correspondence and the threshold value of described voltage-stable transistor, be less than the described filtering voltage of corresponding described filtering voltage, what therefore the output of described voltage stabilizing circuit exported is the difference of described voltage of voltage regulation and described threshold value, thus the output of described voltage stabilizing circuit exports described fixed voltage.
3. the first adjuster described in comprises the first voltage divider and the first comparison circuit, and the dividing potential drop that voltage of voltage regulation is carried out the first multiple by described first voltage divider produces the first dividing potential drop; Described first dividing potential drop compares with the first reference voltage by described first comparison circuit; Because described first dividing potential drop is obtain after described first voltage divider of employing carries out the dividing potential drop of the first multiple, thus the first less reference voltage can be provided to compare.
Accompanying drawing explanation
Fig. 1 illustrates the output voltage regulation circuit of the charge pump into prior art.
Fig. 2 illustrates the output voltage regulation circuit module map into charge pump of the present invention.
Fig. 3 illustrates the circuit structure diagram into voltage stabilizing circuit in charge pump output voltage regulation circuit of the present invention.
It is the circuit structure diagram of the voltage stabilizing circuit comprising the first adjuster one implementation in Fig. 3 that Fig. 4 illustrates.
Fig. 5 illustrates the circuit structure diagram into filter circuit in charge pump of the present invention and output voltage regulation circuit thereof.
It is comprise the charge pump of the second adjuster one implementation and the circuit structure diagram of filter circuit thereof in Fig. 5 that Fig. 6 illustrates.
Embodiment
Just as described in the background section, adopting the input of voltage as charge pump of changing value, also can there is a side-play amount in the value of the output voltage of corresponding generation.Therefore how to make output voltage be a stable magnitude of voltage for programming, be the problem needing research.
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are namely described in detail the specific embodiment of the present invention in conjunction with the accompanying drawings and embodiments below.
Set forth a lot of detail in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here to implement, therefore the present invention is not by the restriction of following public specific embodiment.
The problem that the present invention solves provides a kind of charge pump output voltage regulation circuit, to reach output voltage stabilization, thus meets the requirement providing programming.
Refer to Fig. 2, Fig. 2 illustrates the output voltage regulation circuit module map into charge pump of the present invention.
For solving the problem, the invention provides a kind of charge pump output voltage regulation circuit, the input voltage of described charge pump 10 is the driving voltage VDDQ of change, and this voltage regulator circuit comprises:
Filter circuit 20, its input is connected with the output of described charge pump 10, in order to the output voltage VH of described charge pump 10 is carried out filtering, to produce filtering voltage VPP_PRE and to export;
Voltage stabilizing circuit 30, its input is connected with the output of described filter circuit 20, and in order to receive described filtering voltage VPP_PRE, the output of described voltage stabilizing circuit 30 exports fixed voltage VPP.
Wherein, the input voltage of described charge pump 10 can be such as 2.7V ~ ~ 5.5V; Described fixed voltage VPP this to sentence 7.6V be example, and not as limit; Certainly, described fixed voltage VPP also can be 8V or other high pressure, and the size of described fixed voltage VPP depends on corresponding flash memory programming voltage.
Owing to adopting voltage stabilizing circuit 30, by the filtering voltage VPP_PRE produced after filter circuit 30 filtering, voltage stabilizing is carried out to the output voltage VH of charge pump, export fixed voltage VPP, thus meet the requirement of fixed voltage VPP as program voltage of output.
Please consult Fig. 3, Fig. 3 illustrates the circuit structure diagram into voltage stabilizing circuit in charge pump output voltage regulation circuit of the present invention.
Wherein, described voltage stabilizing circuit 30 comprises: voltage-stable transistor 31, and its source electrode is connected with the output of described filter circuit 20 with in drain electrode, and another exports described fixed voltage VPP as the output of described voltage stabilizing circuit 30; Voltage stabilizing charge pump 32, its input input fixed value voltage VDD, output connects the grid of described voltage-stable transistor 31, and the output of described voltage stabilizing charge pump 32 produces voltage of voltage regulation, and described voltage of voltage regulation is in order to the control voltage as described voltage-stable transistor 31 grid; Wherein, the difference of the threshold voltage of described voltage of voltage regulation and described voltage-stable transistor 31 is less than described filtering voltage VPP_PRE, described voltage-stable transistor 31 is operated in saturation region, and the value of described fixed voltage VPP equals the difference of the value of described voltage of voltage regulation and the threshold voltage of described voltage-stable transistor 31.
Wherein, described fixed value voltage VDD is 1V, 1.2V, 1.5V or 1.8V; Because employing fixed value voltage, thus described voltage stabilizing charge pump 32 output produce voltage of voltage regulation also for numerical value fix voltage.
Wherein, described voltage stabilizing circuit 30 also comprises the first adjuster 33, described first adjuster 33 first end connects the output of described voltage stabilizing charge pump 32, described first adjuster 33 second end is connected with the control end of described voltage stabilizing charge pump 32, in order to when described voltage of voltage regulation is more than or equal to the first preset value, disconnect the charging of described voltage stabilizing charge pump 32, when described voltage of voltage regulation is less than described first preset value, the charging of closed described voltage stabilizing charge pump 32.
Illustrating referring again to Fig. 4, Fig. 4 is the circuit structure diagram of the voltage stabilizing circuit comprising the first adjuster one implementation in Fig. 3.
In this embodiment, described first adjuster 33 comprises the first voltage divider 332 and the first comparison circuit 331, described first voltage divider 332 is connected with the output of described voltage stabilizing charge pump 32, in order to receive described voltage of voltage regulation, the dividing potential drop of described voltage of voltage regulation being carried out the first multiple produces the first dividing potential drop; Described first comparison circuit 331 is connected with described first voltage divider 332, and be connected with the control end of described voltage stabilizing charge pump 32, in order to described first dividing potential drop is compared with the first reference voltage V REF1, when described first dividing potential drop is more than or equal to described first reference voltage V REF1, disconnect the charging of described voltage stabilizing charge pump 32, when described first dividing potential drop is less than described first reference voltage V REF1, the charging of closed described voltage stabilizing charge pump 32; Wherein, described first reference voltage V REF1 and the long-pending of described first multiple equal described first preset value.Wherein, disconnect the charging of described voltage stabilizing charge pump 32, the clock driver circuit that disconnects described voltage stabilizing charge pump 32 can be specially or the driving force of described clock driver circuit is died down; And described closed described voltage stabilizing charge pump 32 be charged as contrary process.
Because described first dividing potential drop is obtain after described first voltage divider 332 of employing carries out the dividing potential drop of the first multiple, thus the first less reference voltage V REF1 can be provided to compare.
Wherein, the scope of described first reference voltage is 0.5V ~ ~ 1.2V.
Wherein, described first adjuster 33 is independent component with described voltage stabilizing charge pump 32.Certainly, described first adjuster 33 also can be integrated in described voltage stabilizing charge pump 32.
Described first multiple can be 9 herein, and described first reference voltage can be 0.9V herein, when described first dividing potential drop is more than or equal to described first reference voltage V REF1 (0.9V), disconnect the clock driver circuit of described voltage stabilizing charge pump 32 or the driving force of described clock driver circuit is died down, when described first dividing potential drop is less than described first reference voltage V REF1 (0.9V), closes the clock driver circuit of described voltage stabilizing charge pump 32 or make the driving force grow of described clock driver circuit.Thus guarantee that the voltage of voltage regulation that described voltage stabilizing charge pump 32 exports is 8.1V.Described first preset value is 8.1V, and the threshold voltage of described voltage-stable transistor 31 is 0.5V; The described fixed voltage VPP then exported is the difference of described first preset value and described threshold voltage, is 7.6V.
Fig. 5 illustrates the circuit structure diagram into filter circuit in charge pump of the present invention and output voltage regulation circuit thereof.
Wherein, described filter circuit 20 comprises: load 21, and its first end is connected with the output of described charge pump 10; Filter capacitor 25, its one end is connected with the second end of described load 21, other end ground connection; Current source 22, its one end is connected with the second end of described load 21, other end ground connection; Filter crystal pipe 23, its grid is connected with the second end of described load 21, the source electrode of described filter crystal pipe 23 is connected with the output of described charge pump 10 with in drain electrode, for receiving the output voltage VH of described charge pump 10, another exports described filtering voltage VPP_PRE as the output of described filter circuit 20.
Certainly, the filter capacitor 25 in described filter circuit 20 can also be that one end is connected with the output of described charge pump 10, other end ground connection.
Wherein, described filter crystal pipe 23 is P type field effect transistor, and its drain electrode is connected with the output of described charge pump 10, and source electrode, as the output of described filter circuit 20, exports described filtering voltage VPP_PRE.
Wherein, described filter circuit 20 also comprises the second adjuster 24, described second adjuster 24 first end connects the output of described filter circuit 20, described second adjuster second end is connected with the control end of described charge pump 10, in order to when described filtering voltage VPP_PRE is more than or equal to the second preset value, disconnect the charging of described charge pump 10, when described filtering voltage VPP_PRE is less than described second preset value, the charging of closed described charge pump 10.
At application charge pump output voltage regulation circuit of the present invention, can be set as that the difference of the threshold value of described first preset value and described voltage-stable transistor 31 is less than described second preset value.Thus the output of described voltage stabilizing circuit 30 exports is the difference of described voltage of voltage regulation and described threshold value, thus the output of described voltage stabilizing circuit 30 exports described fixed voltage VPP.
It is comprise the charge pump of the second adjuster one implementation and the circuit structure diagram of filter circuit thereof in Fig. 5 that Fig. 6 illustrates.
In this embodiment, described second adjuster 24 comprises the second voltage divider 241 and the second comparison circuit 242, described second voltage divider 241 is connected with the output of described filter circuit 20, in order to receive described filtering voltage VPP_PRE, the dividing potential drop that described filtering voltage VPP_PRE carries out the second multiple is produced the second dividing potential drop; Described second comparison circuit 242 is connected with described second voltage divider 241, and be connected with the control end of described charge pump 10, in order to described second dividing potential drop is compared with the second reference voltage V REF2, when described second dividing potential drop is more than or equal to described second reference voltage V REF2, disconnect the charging of described charge pump 10, when described second dividing potential drop is less than described second reference voltage V REF2, the charging of closed described charge pump 10; Wherein, described second reference voltage V REF2 and the long-pending of described second multiple equal described second preset value.Wherein, disconnect the charging of described charge pump 10, the clock driver circuit that disconnects described charge pump 10 can be specially or the driving force of described clock driver circuit is died down; And described closed described charge pump 10 be charged as contrary process.
Because described second dividing potential drop is obtain after described second voltage divider 332 of employing carries out the dividing potential drop of the second multiple, thus the second less reference voltage V REF2 can be provided to compare.
Wherein, the scope of described second reference voltage can be 0.5V ~ ~ 1.2V.
Wherein, described second adjuster 24 is independent component with described charge pump 10; Certainly, described second adjuster 24 also can be integrated in described charge pump 10.
Described second multiple can be 8 herein, and described second reference voltage can be 1V herein, and described second preset value is 8V.When described second dividing potential drop is more than or equal to described second reference voltage V REF2 (1V), disconnect the clock driver circuit of described charge pump 10 or the driving force of described clock driver circuit is died down, when described second dividing potential drop is less than described second reference voltage V REF2 (1V), closes the clock driver circuit of described charge pump 10 or make the driving force grow of described clock driver circuit.Thus guarantee that described filtering voltage VPP_PRE is 8V.In an application example of the present invention, described output voltage VH is 9V, and the voltage difference at described load 21 two ends is assumed to be 0.5V, then the grid voltage of described filter crystal pipe 23 is 8.5V, and the threshold voltage of described filter crystal pipe 23 is such as 0.5V.Thus the difference of the threshold voltage of the grid voltage of described filter crystal pipe 23 and described filter crystal pipe 23 is 8V, be less than described output voltage VH, described filter crystal pipe 23 is operated in saturation region, and therefore the value of described filtering voltage is the difference of the grid voltage of described filter crystal pipe 23 and the threshold voltage of described filter crystal pipe 23.
Wherein, described load 21 is any one in resistance, transistor, diode, triode.When described load 21 is transistor, its resistance can be corresponding comparatively large, and filter circuit 20 is determined by the capacitance product of the resistance of load 21 and filter capacitor 25, and correspondingly, the area of described filter capacitor 25 can be accomplished less.
Visible, by the acting in conjunction of described filter circuit 20 and voltage stabilizing circuit 30, on the one hand, by the effect of described filter circuit 20, the ripple of the output voltage VDDQ of described charge pump 10 is filtered, obtains described filtering voltage VPP_PRE; On the other hand, by described voltage stabilizing circuit 30, described filtering voltage VPP_PRE is acted on, and then the fixed voltage VPP that formation voltage value is fixing.Because described ripple carries out filtering by filter circuit 20, thus there is no DC current source in described voltage stabilizing circuit 30 yet.On the one hand, the area of DC current source is decreased in described voltage stabilizing circuit 30; On the other hand, after decreasing DC current source in described voltage stabilizing circuit 30, the driver capacity requirement of required voltage stabilizing charge pump 32 diminishes, thus the area of voltage stabilizing charge pump 32 can be accomplished less.Therefore, the area of described voltage stabilizing circuit 30 is less.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can make possible variation and amendment, the scope that therefore protection scope of the present invention should define with the claims in the present invention is as the criterion.
Claims (19)
1. a charge pump output voltage regulation circuit, the input voltage of described charge pump is the driving voltage of change, and it is characterized in that, this voltage regulator circuit comprises:
Filter circuit, its input is connected with described electric charge delivery side of pump, in order to the output voltage of described charge pump is carried out filtering, to produce filtering voltage and to export;
Voltage stabilizing circuit, its input is connected with the output of described filter circuit, and in order to receive described filtering voltage, the output of described voltage stabilizing circuit exports fixed voltage;
Described voltage stabilizing circuit comprises: voltage-stable transistor, and its source electrode is connected with the output of described filter circuit with in drain electrode, and another exports described fixed voltage as the output of described voltage stabilizing circuit; Voltage stabilizing charge pump, its input input fixed value voltage, output connects the grid of described voltage-stable transistor, and described voltage stabilizing electric charge delivery side of pump produces voltage of voltage regulation, and described voltage of voltage regulation is in order to the control voltage as described voltage-stable transistor grid; Wherein, the difference of the threshold voltage of described voltage of voltage regulation and described voltage-stable transistor is less than described filtering voltage, and the value of described fixed voltage equals the difference of the value of described voltage of voltage regulation and the threshold voltage of described voltage-stable transistor.
2. charge pump output voltage regulation circuit as claimed in claim 1, it is characterized in that, the input voltage of described charge pump is 2.7V ~ ~ 5.5V.
3. charge pump output voltage regulation circuit as claimed in claim 1, it is characterized in that, described fixed voltage is 7.6V or 8V.
4. charge pump output voltage regulation circuit as claimed in claim 1, it is characterized in that, described fixed value voltage is 1V, 1.2V, 1.5V or 1.8V.
5. charge pump output voltage regulation circuit as claimed in claim 1, it is characterized in that, described voltage-stable transistor is P type field effect transistor, and its drain electrode is connected with the output of described filter circuit, source electrode, as the output of described voltage stabilizing circuit, exports described fixed voltage.
6. charge pump output voltage regulation circuit as claimed in claim 1, it is characterized in that, described voltage stabilizing circuit also comprises the first adjuster, described first adjuster first end connects described voltage stabilizing electric charge delivery side of pump, described first adjuster second end is connected with the control end of described voltage stabilizing charge pump, in order to when described voltage of voltage regulation is more than or equal to the first preset value, disconnect the charging of described voltage stabilizing charge pump, when described voltage of voltage regulation is less than described first preset value, the charging of closed described voltage stabilizing charge pump.
7. charge pump output voltage regulation circuit as claimed in claim 6, it is characterized in that, described first adjuster comprises the first voltage divider and the first comparison circuit, described first voltage divider is connected with described voltage stabilizing electric charge delivery side of pump, in order to receive described voltage of voltage regulation, the dividing potential drop of described voltage of voltage regulation being carried out the first multiple produces the first dividing potential drop; Described first comparison circuit is connected with described first voltage divider, and be connected with the control end of described voltage stabilizing charge pump, in order to described first dividing potential drop is compared with the first reference voltage, when described first dividing potential drop is more than or equal to described first reference voltage, disconnect the clock driver circuit of described voltage stabilizing charge pump or the driving force of described clock driver circuit is died down, when described first dividing potential drop is less than described first reference voltage, closes the clock driver circuit of described voltage stabilizing charge pump or make the driving force grow of described clock driver circuit; Wherein, described first reference voltage and the long-pending of described first multiple equal described first preset value.
8. charge pump output voltage regulation circuit as claimed in claim 7, it is characterized in that, the scope of described first reference voltage is 0.5V ~ ~ 1.2V.
9. charge pump output voltage regulation circuit as claimed in claim 6, it is characterized in that, described first adjuster is integrated in described voltage stabilizing charge pump.
10. charge pump output voltage regulation circuit as claimed in claim 6, it is characterized in that, described first adjuster and described voltage stabilizing charge pump are independent component.
11. charge pump output voltage regulation circuits according to any one of claim 1-10, it is characterized in that, described filter circuit comprises: load, and its first end is connected with described electric charge delivery side of pump; Filter capacitor, its one end is connected with the second end of described load, other end ground connection; Current source, its one end is connected with the second end of described load, other end ground connection; Filter crystal pipe, its grid is connected with the second end of described load, and the source electrode of described filter crystal pipe is connected with described electric charge delivery side of pump, for receiving the output voltage of described charge pump with in drain electrode, another exports described filtering voltage as the output of described filter circuit.
12. charge pump output voltage regulation circuits as claimed in claim 11, it is characterized in that, described filter crystal pipe is P type field effect transistor, and its drain electrode is connected with described electric charge delivery side of pump, source electrode, as the output of described filter circuit, exports described filtering voltage.
13. charge pump output voltage regulation circuits as claimed in claim 11, it is characterized in that, described filter circuit also comprises the second adjuster, described second adjuster first end connects the output of described filter circuit, described second adjuster second end is connected with the control end of described charge pump, and be connected with the control end of described charge pump, in order to when described filtering voltage is more than or equal to the second preset value, disconnect the charging of described charge pump, when described filtering voltage is less than described second preset value, the charging of closed described charge pump.
14. charge pump output voltage regulation circuits as claimed in claim 13, it is characterized in that, described second adjuster comprises the second voltage divider and the second comparison circuit, described second voltage divider is connected with the output of described filter circuit, in order to receive described filtering voltage, the dividing potential drop of described filtering voltage being carried out the second multiple produces the second dividing potential drop; Described second comparison circuit is connected with described second voltage divider, in order to described second dividing potential drop is compared with the second reference voltage, when described second dividing potential drop is more than or equal to described second reference voltage, disconnect the clock driver circuit of described charge pump or the driving force of described clock driver circuit is died down, when described second dividing potential drop is less than described second reference voltage, closes the clock driver circuit of described charge pump or make the driving force grow of described clock driver circuit; Wherein, described second reference voltage and the long-pending of described second multiple equal described second preset value.
15. charge pump output voltage regulation circuits as claimed in claim 14, is characterized in that, the scope of described second reference voltage is 0.5V ~ ~ 1.2V.
16. charge pump output voltage regulation circuits as claimed in claim 13, it is characterized in that, described second adjuster is integrated in described charge pump.
17. charge pump output voltage regulation circuits as claimed in claim 13, it is characterized in that, described second adjuster and described charge pump are independent component.
18. charge pump output voltage regulation circuits as claimed in claim 11, it is characterized in that, described load is any one in resistance, transistor, diode, triode.
19. charge pump output voltage regulation circuits according to any one of claim 1-10, it is characterized in that, described filter circuit comprises: load, and its first end is connected with described electric charge delivery side of pump; Filter capacitor, its one end is connected with described electric charge delivery side of pump, other end ground connection; Current source, its one end is connected with the second end of described load, other end ground connection; Filter crystal pipe, its grid is connected with the second end of described load, and the source electrode of described filter crystal pipe is connected with described electric charge delivery side of pump, for receiving the output voltage of described charge pump with in drain electrode, another exports described filtering voltage as the output of described filter circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110117361.0A CN102158076B (en) | 2011-05-06 | 2011-05-06 | Charge pump output voltage regulation circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110117361.0A CN102158076B (en) | 2011-05-06 | 2011-05-06 | Charge pump output voltage regulation circuit |
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| CN103413567B (en) * | 2013-08-22 | 2016-03-09 | 上海华虹宏力半导体制造有限公司 | Reference voltage provides circuit |
| CN103413568B (en) * | 2013-08-22 | 2016-09-07 | 上海华虹宏力半导体制造有限公司 | Reference voltage provides circuit |
| US9923457B2 (en) * | 2015-04-23 | 2018-03-20 | Taiwan Semiconductor Manufacturing Company, Ltd. | Regulated power converter and method of operating the same |
| CN108696118B (en) * | 2017-04-07 | 2020-12-08 | 原相科技(槟城)有限公司 | Boosting circuit and method for biasing substrate therein |
| CN108808643B (en) * | 2018-05-31 | 2019-11-29 | 上海艾为电子技术股份有限公司 | A kind of analog switching circuit |
| CN109067170A (en) * | 2018-07-25 | 2018-12-21 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of pressure stabilizing source circuit |
| CN110299173B (en) * | 2019-07-05 | 2021-05-04 | 合肥联诺科技股份有限公司 | Controllable discharging module for NOR FLASH programming processing |
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| CN101674012A (en) * | 2009-10-14 | 2010-03-17 | 上海宏力半导体制造有限公司 | Charge pump circuit |
| CN101764518A (en) * | 2009-11-18 | 2010-06-30 | 上海宏力半导体制造有限公司 | Capacitive charge pump circuit |
| CN101847026A (en) * | 2010-05-18 | 2010-09-29 | 北京航空航天大学 | Voltage stabilizer on mixed signal integrated circuit chip |
| CN101888180A (en) * | 2010-07-16 | 2010-11-17 | 上海宏力半导体制造有限公司 | Output voltage regulator circuit of charge pump |
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| US7015735B2 (en) * | 2003-12-19 | 2006-03-21 | Renesas Technology Corp. | Semiconductor integrated circuit having built-in PLL circuit |
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| CN101674012A (en) * | 2009-10-14 | 2010-03-17 | 上海宏力半导体制造有限公司 | Charge pump circuit |
| CN101764518A (en) * | 2009-11-18 | 2010-06-30 | 上海宏力半导体制造有限公司 | Capacitive charge pump circuit |
| CN101847026A (en) * | 2010-05-18 | 2010-09-29 | 北京航空航天大学 | Voltage stabilizer on mixed signal integrated circuit chip |
| CN101888180A (en) * | 2010-07-16 | 2010-11-17 | 上海宏力半导体制造有限公司 | Output voltage regulator circuit of charge pump |
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