CN101674012A - Charge pump circuit - Google Patents
Charge pump circuit Download PDFInfo
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- CN101674012A CN101674012A CN200910197170A CN200910197170A CN101674012A CN 101674012 A CN101674012 A CN 101674012A CN 200910197170 A CN200910197170 A CN 200910197170A CN 200910197170 A CN200910197170 A CN 200910197170A CN 101674012 A CN101674012 A CN 101674012A
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- charge pump
- voltage
- tie point
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- predetermined value
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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
Abstract
The invention discloses a charge pump circuit to reduce the corrugated phenomenon of the output signal of a charge pump circuit and improve the stability of the output signal of the charge pump circuit. The charge pump circuit comprises a main charge pump, a standby charge pump, a filtration capicitor and a control module of the standby charge pump, wherein the control module of the standby chargepump is connected to the standby charge pump and the filtration capicitor, and is used for controlling the standby charge pump to be disconnected from the connection point connected with the filtration capicitor when the voltage of the connection point is not lower than a preset value, and controlling the standby charge pump to be connected to the connection point when the voltage of the connection point is lower than the preset value.
Description
Technical field
The present invention relates to semiconductor applications, relate in particular to charge pump circuit.
Background technology
Charge pump circuit is widely used in chips such as memory, and the data manipulation that is generally chip provides high voltage, and the low voltage signal that is about to import charge pump circuit is converted to high voltage signal.
Structure shown in Figure 1 is a kind of existing charge pump circuit 10, comprises the charge pump 11, the filtration electric capacity (C that connect in turn
Filter) 12, load capacitance (C
Load) 13 and load current structure (I
Load) 14; Wherein charge pump 11 comprises signal input part 110, control input end 111 and signal output part 112, and signal output part 112 is connected to C
Filter12.
Waveform shown in Figure 2 is the waveform of the high-voltage signal HV of the waveform of control signal Web of Fig. 1 charge pump circuit 10 and output, and in conjunction with Fig. 2 and Fig. 1, the operation principle of charge pump circuit 10 is: signal input part 110 input low-voltage signals; After the control signal upset of control input end 111 inputs, trigger 11 couples of C of charge pump
Filter12, C
Load13 and I
Load14 chargings; After being charged to predetermined value, signal output part 112 output high-voltage signal HV.
Between the time point that control signal Web point flip-flop transition shown in Figure 2 and high-voltage signal HV rise to high pressure arranged a time period, this time period is the rise time, and the rise time is short more, illustrates that signal delay is more little, and performance is high more.
High-voltage signal HV shown in Figure 2 has one section zigzag waveform, this waveform be called high-voltage signal HV's " ripple ", the reason of its generation is: charge pump 11 is not continuous operation, it is charging process off and on, therefore when it stops to charge, the voltage of high-voltage signal HV will take place to fall phenomenon after rise, so produced " ripple " phenomenon." ripple " is big more, illustrates that then high-voltage signal HV is unstable more, and performance is low more.
For reducing " ripple " phenomenon, be added with C in the described charge pump circuit 10
Filter12, C
FilterTherefore 12 have the effect of burning voltage, can reduce " ripple " of high-voltage signal HV, but with do not add C
Filter12 circuit is compared, and the charge pump 11 in the charge pump circuit 10 need expend the longer time can be with C
Load13 and I
Load14 charge to predetermined value output high-voltage signal HV, and promptly charge pump circuit 10 has increased the rise time.
For reducing the rise time, industry proposes charge pump circuit 30 shown in Figure 3, compares with circuit shown in Figure 2, and its increase has a plurality of standby charge pumps 31, reduces the charging interval by increasing charging ability, thereby reduces the rise time.But the defective of circuit shown in Figure 3 is:
Because " ripple " phenomenon causes by charge pump, therefore increased standby charge pump 31 also just strengthened charge pump circuit 30 output signals " " phenomenon, this makes that signal stabilization of charge pump circuit 30 outputs is lower to ripple.
Summary of the invention
The invention provides charge pump circuit,, improve the stability of electric charge circuit output signal to reduce " ripple " phenomenon of charge pump circuit output signal.
Charge pump circuit provided by the invention comprises: main charge pump, standby charge pump and filtration electric capacity; Also comprise standby charge pump control module, be connected to described standby charge pump and filter electric capacity, control described standby charge pump when being used for voltage at the tie point that is connected with described filtration electric capacity and disconnect, and be lower than predetermined value time control preparation at the voltage of this tie point and be connected to described tie point with charge pump from this tie point more than or equal to predetermined value.
Charge pump circuit provided by the invention is added with standby charge pump control module between standby charge pump and filtration electric capacity, can be at standby charge pump with the voltage that filters the tie point that electric capacity is connected during more than or equal to predetermined value, standby charge pump is disconnected from tie point, and when described voltage is lower than predetermined value, standby charge pump is connected to this tie point to charge to filtering electric capacity, therefore charge pump circuit provided by the invention can adopt standby charge pump to filtering the electric capacity charging when the filtration capacitance voltage does not reach predetermined value, also can avoid in the prior art, after standby charge pump will filter electric capacity and charge to predetermined value, also be connected this tie point and aggravate " ripple " phenomenon, the problem that causes the reduction of charge pump circuit stable output signal, so charge pump circuit provided by the invention has reduced " ripple " phenomenon, improved the stability of charge pump circuit output signal.
Description of drawings
Fig. 1 is a kind of existing charge pump circuit structural representation;
Fig. 2 is the output signal of circuit shown in Figure 1 and the oscillogram of control signal;
Fig. 3 is the another kind of charge pump circuit structure chart that comprises standby charge pump;
Fig. 4 is a charge pump circuit structural representation in the embodiment of the invention;
Fig. 5 is standby charge pump switches control circuit structural representation;
Fig. 6 is the another kind of charge pump circuit structural representation of present embodiment.
Embodiment
The problem of mentioning at background technology, the present application people analyzes: aggravated " ripple " phenomenon owing to charge pump circuit shown in Figure 3 30 has a plurality of standby charge pumps 31, if therefore can after standby charge pump 31 charges electricity, it be disconnected from charge pump circuit, then can reduce the problem of standby charge pump 31 aggravation " ripple " phenomenons, improve the stability of output signal.
Further analyze, charge pump circuit 30 has two parts to need charging substantially, the one, Cfilter 32, the 2nd, the loading section 33 that load capacitance and load current constitute, if after Cfilter32 being charged electricity, just standby charge pump 31 is disconnected to reduce " ripple " phenomenon with standby charge pump 31, then owing to the electric capacity of Cfilter 32 electric capacity much larger than loading section 33, therefore disconnect the back separately with 33 chargings of 34 pairs of loading sections of main charge pump at standby charge pump 31, also can finish charging faster, make the rise time also can satisfy the demand.
Based on this thinking, present embodiment has proposed charge pump circuit shown in Figure 4 40, comprise main charge pump 41, standby charge pump 42, filter electric capacity 43 and standby charge pump control module 44, wherein standby charge pump control module 44 is connected standby charge pump 42 and filters between the electric capacity 43.The voltage that 43 chargings of 42 pairs of filtrations of standby charge pump electric capacity are about to tie point 45 is promoted to predetermined value, therefore can whether reach predetermined value by the voltage of tie point 45 judges whether standby charge pump 42 finishes charging, if finish, then available backup charge pump control module 44 disconnects standby charge pump 41 from tie point 45.Before 42 pairs of standby charge pumps filtered electric capacity 43 chargings or charge electricity, the voltage of this tie point 45 did not reach predetermined value, and therefore standby charge pump control module 44 needs the standby charge pump 42 of control to be connected to tie point 45.
Standby charge pump control module 44 can have multiple structure, the structure of standby charge pump control module 44 is to adopt switch to realize being connected and disconnection of standby charge pump 42 and tie point 45 among Fig. 4, comprise standby charge pump switches 440, be connected between standby charge pump 42 and the filtration electric capacity 43; Standby charge pump switches control circuit 441 is connected on the standby charge pump switches 440, be used for controlling the disconnection and the closure of standby charge pump switches 440, wherein when the magnitude of voltage of tie point 45 is greater than or equal to predetermined value, illustrate that standby charge pump 42 finished charging, then control standby charge pump switches 440 and disconnect, when the magnitude of voltage of tie point 45 was lower than predetermined value, explanation need be charged, then control standby charge pump switches 440 closures, standby charge pump 42 is connected to charging on the tie point 45.
Standby charge pump switches control circuit 441 also can have multiple, standby charge pump switches control circuit 441 shown in Figure 5 comprises: interconnective first resistance R 1 and second resistance R 2, one end of first resistance R 1 is connected to tie point 45, can obtain the voltage of tie point 45, an end ground connection of second resistance R 2; The voltage of the junction N of first resistance R 1 and second resistance R 2 is voltage as a comparison, and the voltage of this contrast potential and tie point 45 is corresponding one by one, is used for contrasting with normal voltage;
Structure shown in Figure 5 also comprises comparator R, this comparator R has two inputs and an output, one of them input a is connected to junction N, then the voltage of input a input is exactly contrast potential, another input b is used to import normal voltage, and normal voltage and above-mentioned predetermined value are corresponding one by one, i.e. the voltage of the corresponding tie point 45 of contrast potential, therefore the normal voltage respective predetermined values compares voltage and the predetermined value that contrast potential and normal voltage also just are equivalent to comparison tie point 45.What output c exported is normally logical one or logical zero of comparison signal, be used for showing whether tie point 45 voltages are lower than predetermined value, if be lower than, when then comparison signal is input to standby charge pump switches 440, these switch 440 closures, if be greater than or equal to, that standby charge pump switches 440 disconnects.Wherein can control closure and logical zero control disconnection with logical one, also can disconnect and logical zero control closure with logical one control, preferable, usually can adopt the further boosted voltage of logical one of level shifter to output c output, for example be increased to the output level of standby charge pump 42, control the disconnection or the closure of standby charge pump switches 440 then with the logical one behind the boosted voltage, to guarantee that standby charge pump switches 440 can disconnect smoothly and closure.
Structure shown in Figure 5 is actual can be divided into two parts, and a part is first resistance R 1 and second resistance R 2, its role is to obtain contrast potential according to the voltage of tie point 45; Another part is comparator R, it is connected to standby charge pump switches 440, be used for comparison contrast potential and normal voltage, and to described standby charge pump switches output comparison signal, wherein said normal voltage is unique corresponding with described predetermined value, control described standby charge pump switches when described comparison signal can be greater than or equal to predetermined value at the magnitude of voltage of this tie point and disconnect, and when this tie point magnitude of voltage is lower than predetermined value, control described standby charge pump switches closure.These two parts can also adopt other structure except can realizing with the structure of Fig. 5, for example use other bleeder circuit as first, and pressurizer is as another part.
Shown in Figure 6 is another kind of charge pump circuit 60 structures of present embodiment, be that with the structure difference of Fig. 4 it possesses main charge pump control module 61, main charge pump control module 61 is connected between main charge pump 63 and the tie point 62, can be greater than or equal to predetermined value at the voltage of tie point 62 is after standby charge pump 64 charges electricity, main charge pump 63 is connected with tie point 62, and before the voltage of tie point 62 is lower than predetermined value to be standby charge pump 64 chargings or before charging electricity, keep main charge pump 63 and tie point 62 to disconnect.This can guarantee that main charge pump 63 mainly or just is loading section 65 chargings, it is shorter than the electricity time that charges of main charge pump 63 that standby charge pump 64 charges the time of electricity, so compare with Fig. 4 structure, main charge pump 63 mainly or just is loading section 65 chargings, can shorten the charging interval, the rise time is smaller.
The structure of main electric charge control module 61 can but be not limited to adopt the structure of standby electric charge control module, the structure that can meet foregoing description can be implemented usually.
In the present embodiment, described main charge pump control module 61 specifically comprises:
Main charge pump switches 610 is connected between described main charge pump 63 and this tie point 62;
Main charge pump switches control circuit 611 is connected to the described main charge pump switches 610 of using, and is used for controlling when the magnitude of voltage of this tie point 62 is greater than or equal to predetermined value described main charge pump switches 610 closures; And when these tie point 62 magnitudes of voltage are lower than predetermined value, control described main charge pump switches 610 and disconnect.
Wherein said main charge pump switches control circuit 611 can specifically comprise:
Main contrast potential acquiring unit is used for obtaining main contrast potential according to the voltage of this tie point 62;
Main comparing unit, be connected to described main charge pump switches 610, be used for more described main contrast potential and primary standard voltage, and to the main comparison signal of described main charge pump switches 610 outputs, wherein said primary standard voltage is corresponding one by one with described predetermined value, control described main charge pump switches 610 closures when described main comparison signal can be greater than or equal to predetermined value at the magnitude of voltage of this tie point 62, and when these tie point 62 magnitudes of voltage are lower than predetermined value, control described main charge pump switches 610 disconnections.
Described in addition main contrast potential acquiring unit can specifically comprise interconnective the 3rd resistance and the 4th resistance; Wherein the 3rd resistance is connected to described tie point 62, is used to obtain the voltage of tie point 62; The 4th grounding through resistance; The junction of the 3rd resistance and the 4th resistance is connected to the main charge pump switches 610 in the main comparing unit, and the voltage of this junction P is as main contrast potential.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (8)
1, a kind of charge pump circuit comprises main charge pump, standby charge pump and filters electric capacity; It is characterized in that, also comprise:
Standby charge pump control module, be connected to described standby charge pump and filter electric capacity, control described standby charge pump when being used for voltage at the tie point that is connected with described filtration electric capacity and disconnect, and be lower than predetermined value time control preparation at the voltage of this tie point and be connected to described tie point with charge pump from this tie point more than or equal to predetermined value.
2, charge pump circuit as claimed in claim 1 is characterized in that, described standby charge pump control module specifically comprises:
Standby charge pump switches is connected between described standby charge pump and this tie point;
Standby charge pump switches control circuit is connected to described standby charge pump switches, is used for controlling described standby charge pump switches and disconnects when the magnitude of voltage of this tie point is greater than or equal to predetermined value; And when being lower than predetermined value, this tie point magnitude of voltage controls described standby charge pump switches closure.
3, charge pump circuit as claimed in claim 2 is characterized in that, described standby charge pump switches control circuit specifically comprises:
The contrast potential acquiring unit is used for obtaining contrast potential according to the voltage of this tie point;
Comparing unit, be connected to described standby charge pump switches, be used for more described contrast potential and normal voltage, and to described standby charge pump switches output comparison signal, wherein said normal voltage is unique corresponding with described predetermined value, control described standby charge pump switches when described comparison signal can be greater than or equal to predetermined value at the magnitude of voltage of this tie point and disconnect, and when this tie point magnitude of voltage is lower than predetermined value, control described standby charge pump switches closure.
4, charge pump circuit as claimed in claim 3 is characterized in that, described contrast potential acquiring unit specifically comprises interconnective first resistance and second resistance; Wherein
First resistance is connected to described tie point, is used to obtain tie point voltage;
Second grounding through resistance;
The junction of first resistance and second resistance is connected to comparing unit, and the voltage of this junction is voltage as a comparison.
5, charge pump circuit as claimed in claim 1, it is characterized in that, also comprise main charge pump control module, be connected between this tie point and the main charge pump, be used for when the magnitude of voltage of this tie point is greater than or equal to predetermined value, controlling main charge pump and be connected to described tie point, and when the magnitude of voltage of this tie point is lower than predetermined value, control main charge pump and disconnect from described tie point.
6, charge pump circuit as claimed in claim 5 is characterized in that, described main charge pump control module specifically comprises:
Main charge pump switches is connected between described main charge pump and this tie point;
Main charge pump switches control circuit is connected to described master and uses charge pump switches, is used for controlling when the magnitude of voltage of this tie point is greater than or equal to predetermined value described main charge pump switches closure; And when this tie point magnitude of voltage is lower than predetermined value, control described main charge pump switches and disconnect.
7, charge pump circuit as claimed in claim 6 is characterized in that, described main charge pump switches control circuit specifically comprises:
Main contrast potential acquiring unit is used for obtaining main contrast potential according to the voltage of this tie point;
Main comparing unit, be connected to described main charge pump switches, be used for more described main contrast potential and primary standard voltage, and export main comparison signal to described main charge pump switches, wherein said primary standard voltage is corresponding one by one with described predetermined value, control described main charge pump switches closure when described main comparison signal can be greater than or equal to predetermined value at the magnitude of voltage of this tie point, and when this tie point magnitude of voltage is lower than predetermined value, control described main charge pump switches disconnection.
8, charge pump circuit as claimed in claim 7 is characterized in that, described main contrast potential acquiring unit specifically comprises interconnective the 3rd resistance and the 4th resistance; Wherein
The 3rd resistance is connected to described tie point, is used to obtain tie point voltage;
The 4th grounding through resistance;
The junction of the 3rd resistance and the 4th resistance is connected to comparing unit, and the voltage of this junction is as main contrast potential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101971702A CN101674012B (en) | 2009-10-14 | 2009-10-14 | Charge pump circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101971702A CN101674012B (en) | 2009-10-14 | 2009-10-14 | Charge pump circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101674012A true CN101674012A (en) | 2010-03-17 |
| CN101674012B CN101674012B (en) | 2012-07-25 |
Family
ID=42021062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101971702A Active CN101674012B (en) | 2009-10-14 | 2009-10-14 | Charge pump circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101674012B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847432A (en) * | 2010-05-28 | 2010-09-29 | 上海宏力半导体制造有限公司 | Power supply structure of memory |
| CN102055318A (en) * | 2009-11-04 | 2011-05-11 | 上海宏力半导体制造有限公司 | Charge pump device and voltage-stabilizing method thereof |
| CN102158076A (en) * | 2011-05-06 | 2011-08-17 | 上海宏力半导体制造有限公司 | Output voltage regulator circuit of charge pump |
| CN105896962A (en) * | 2016-06-12 | 2016-08-24 | 北京兆易创新科技股份有限公司 | Charge pump control circuit |
| CN108696118A (en) * | 2017-04-07 | 2018-10-23 | 原相科技(槟城)有限公司 | The bias method of boost pressure circuit and matrix therein |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6275096B1 (en) * | 1999-12-14 | 2001-08-14 | International Business Machines Corporation | Charge pump system having multiple independently activated charge pumps and corresponding method |
-
2009
- 2009-10-14 CN CN2009101971702A patent/CN101674012B/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055318A (en) * | 2009-11-04 | 2011-05-11 | 上海宏力半导体制造有限公司 | Charge pump device and voltage-stabilizing method thereof |
| CN102055318B (en) * | 2009-11-04 | 2013-03-06 | 上海宏力半导体制造有限公司 | Charge pump device and voltage-stabilizing method thereof |
| CN101847432A (en) * | 2010-05-28 | 2010-09-29 | 上海宏力半导体制造有限公司 | Power supply structure of memory |
| CN101847432B (en) * | 2010-05-28 | 2015-04-15 | 上海华虹宏力半导体制造有限公司 | Power supply structure of memory |
| CN102158076A (en) * | 2011-05-06 | 2011-08-17 | 上海宏力半导体制造有限公司 | Output voltage regulator circuit of charge pump |
| CN102158076B (en) * | 2011-05-06 | 2015-09-09 | 上海华虹宏力半导体制造有限公司 | Charge pump output voltage regulation circuit |
| CN105896962A (en) * | 2016-06-12 | 2016-08-24 | 北京兆易创新科技股份有限公司 | Charge pump control circuit |
| CN105896962B (en) * | 2016-06-12 | 2018-06-05 | 北京兆易创新科技股份有限公司 | A kind of control electrical appliances for electric charge pump |
| CN108696118A (en) * | 2017-04-07 | 2018-10-23 | 原相科技(槟城)有限公司 | The bias method of boost pressure circuit and matrix therein |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101674012B (en) | 2012-07-25 |
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Owner name: SHANGHAI HUAHONG GRACE SEMICONDUCTOR MANUFACTURING Free format text: FORMER OWNER: HONGLI SEMICONDUCTOR MANUFACTURE CO LTD, SHANGHAI Effective date: 20140512 |
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Effective date of registration: 20140512 Address after: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech Park No. 1399 Patentee after: Shanghai Huahong Grace Semiconductor Manufacturing Corporation Address before: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech Park No. 1399 Patentee before: Hongli Semiconductor Manufacture Co., Ltd., Shanghai |