CN101764518A - Capacitive charge pump circuit - Google Patents
Capacitive charge pump circuit Download PDFInfo
- Publication number
- CN101764518A CN101764518A CN200910198987A CN200910198987A CN101764518A CN 101764518 A CN101764518 A CN 101764518A CN 200910198987 A CN200910198987 A CN 200910198987A CN 200910198987 A CN200910198987 A CN 200910198987A CN 101764518 A CN101764518 A CN 101764518A
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- charge pump
- circuit
- filter capacitor
- charging circuit
- output voltage
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Abstract
The invention discloses a capacitive charge pump circuit, which comprises a main charge pump charging circuit, an energy storage capacitor, an auxiliary charge pump charging circuit and a filter capacitor, wherein the main charge pump charging circuit is used to charge the energy-storage capacitor and the auxiliary charge pump charging circuit is used to charge the filter capacitor. When the output voltage of the charged filter capacitor is larger than the output voltage of the charged energy-storage capacitor, the filter capacitor is connected with the main charge pump charging circuit. By adopting the capacitive charge pump circuit of the invention, the auxiliary charge pump charging circuit is used to charge the filter capacitor, so the ramp-up speed of the output voltage of the charge pump circuit is improved.
Description
Technical field
The present invention relates to the charge pump circuit field, relate in particular to a kind of capacitive charge pump circuit.
Background technology
Capacitive charge pump is owing to have the characteristic of high voltage output, often as providing high-tension power supply to be used for various integrated circuits, as the operating voltage when the semiconductor memory read-write is provided.The charge pump charging circuit that capacitive charge pump is made up of switch arrays, oscillator, logical circuit and comparison controller etc. charges to storage capacitor, thus last output HIGH voltage.Because storage capacitor is is constantly discharged and recharged, thus the last output voltage of storage capacitor have to a certain degree concussion and less stable.For semiconductor memory, its read-write voltage request is more accurate, makes charge pump export stable operating voltage so add the voltage stabilizing circuit of feedback loop in the charge pump circuit of being everlasting.But the comparator in the voltage stabilizing circuit has hysteresis effect, adds the concussion that constantly discharges and recharges, and makes the voltage of the last output of storage capacitor " ripple " phenomenon occur, will cause the integrated circuit (IC) system instability and be somebody's turn to do " ripple " voltage.
In order to reduce " ripple " phenomenon of charge pump output voltage, filter capacitor in parallel on charge pump circuit output storage capacitor usually, as shown in Figure 1.Though add " ripple phenomenon " that filter capacitor can reduce charge pump output voltage, owing to the charge pump charging circuit also can charge to this filter capacitor, thereby cause the storage capacitor charging rate is slowed down, make output voltage oblique ascension speed slow down.And voltage ramp speed slows down, the defective that will cause the integrated circuit processing speed to slow down.
Summary of the invention
The object of the present invention is to provide the fireballing capacitive charge pump circuit of a kind of output voltage stabilization and voltage ramp.
The invention provides a kind of capacitive charge pump circuit, it comprises main charge pump charging circuit, storage capacitor, auxilliary charge pump charging circuit and filter capacitor.Wherein, main charge pump charging circuit is used for the storage capacitor charging, and auxilliary charge pump charging circuit is used for filter capacitor is charged.
As the further improvement of above-mentioned capacitive charge pump circuit, capacitive charge pump circuit also comprises ON-OFF control circuit, and this ON-OFF control circuit is used to control filter capacitor and connects main charge pump charging circuit or auxilliary charge pump charging circuit.
Adopt charge pump circuit of the present invention, by utilizing auxilliary charge pump charging circuit that filter capacitor is charged, and during the output voltage of storage capacitor after the output voltage of the filter capacitor after the charging is more than or equal to charging, control described filter capacitor and connect main charge pump charging circuit, thus the oblique ascension speed of raising charge pump circuit output voltage.
Description of drawings
Fig. 1 is traditional capacitive charge pump circuit functional block diagram.
Fig. 2 is a kind of capacitive charge pump circuit functional block diagram of the specific embodiment of the invention.
Fig. 3 is the another kind of capacitive charge pump circuit functional block diagram of the specific embodiment of the invention.
Embodiment
The defective that causes output voltage oblique ascension speed to slow down at above-mentioned conventional condenser charge pump circuit filter capacitor, the invention provides a kind of capacitive charge pump circuit, as shown in Figure 2, it comprises main charge pump charging circuit, voltage stabilizing circuit, storage capacitor, filter capacitor and ON-OFF control circuit.
When charge pump circuit was started working, input voltage vin 1 was to main charge pump charging circuit, and main charge pump charging circuit begins storage capacitor C
LoadCharging.Meanwhile, input voltage vin 2 is to auxilliary charge pump charging circuit, and the auxilliary charge pump charging circuit of ON-OFF control circuit gating connects filter capacitor C
Filter, auxilliary charge pump charging circuit just begins filter capacitor is charged.When control level ctrl 1 and ctrl 2 low levels, if the output voltage of filter capacitor is during less than the output voltage of storage capacitor, auxilliary charge pump charging circuit continues filter capacitor is charged.During more than or equal to the output voltage of storage capacitor, ON-OFF control circuit just gating master charge pump charging circuit connects filter capacitor up to the output voltage of filter capacitor.At this moment, because the voltage of filter capacitor is more than or equal to the voltage of storage capacitor, main charging lotus pump circuit does not just need filter capacitor is charged, and the unstable component of output voltage in the direct filtering charge pump circuit of filter capacitor, obtain stable output voltage V out, eliminated the slow-footed defective of conventional charge pump circuit voltage ramp.It is emphasized that here the voltage of filter capacitor after auxilliary charge pump charging circuit charging can not be excessive, must not be bigger 4 volts as the output voltage maximum of filter capacitor than storage capacitor output voltage.
As shown in Figure 3, the present invention also provides another kind of charge pump circuit, and it has increased a plurality of auxilliary charge pump charging circuits on the basis of charge pump circuit shown in Figure 2.Its operation principle is for utilizing a plurality of auxilliary charge pump charging circuits repeatedly to filter capacitor charging, can make the output voltage of filter capacitor more than or equal to the output voltage of storage capacitor faster, thereby promote the speed that charge pump circuit obtains regulated output voltage.
The inventor's main design philosophy is to utilize auxilliary charge pump charging circuit that filter capacitor is charged, thereby accelerate the oblique ascension speed of charge pump circuit output voltage, so should not be connected to main charge pump charging circuit as the filter capacitor that yet can utilize sequential control circuit to cooperate control level signal ctr1, ctr2 to control after the charging well only for utilizing ON-OFF control circuit control filter capacitor to connect main charge pump charging circuit or auxilliary charge pump charging circuit.
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 (6)
1. capacitive charge pump circuit, comprise main charge pump charging circuit, storage capacitor and filter capacitor, described main charge pump charging circuit is used for described storage capacitor charging, it is characterized in that, described charge pump circuit also comprises auxilliary charge pump charging circuit, and described auxilliary charge pump charging circuit is used for described filter capacitor charging.
2. charge pump circuit according to claim 1 is characterized in that described charge pump circuit also comprises ON-OFF control circuit, and described ON-OFF control circuit is used to control described filter capacitor and connects described main charge pump charging circuit or auxilliary charge pump charging circuit.
3. as charge pump circuit as described in the claim 2, it is characterized in that when the output voltage of described filter capacitor was lower than the storage capacitor output voltage, described ON-OFF control circuit was used to control described filter capacitor and connects described auxilliary charge pump charging circuit.
4. as charge pump circuit as described in the claim 2, it is characterized in that when the output voltage of described filter capacitor during more than or equal to the storage capacitor output voltage, described ON-OFF control circuit is used to control filter capacitor and connects main charge pump charging circuit.
5. as charge pump circuit as described in the claim 4, it is characterized in that, when the difference between the output voltage of the output voltage of described filter capacitor and storage capacitor during smaller or equal to 4 volts, described switch control electricity is used for road control filter capacitor and connects main charge pump charging circuit.
6. charge pump circuit as claimed in claim 1 or 2 is characterized in that the number of described auxilliary charge pump charging circuit is one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910198987A CN101764518A (en) | 2009-11-18 | 2009-11-18 | Capacitive charge pump circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910198987A CN101764518A (en) | 2009-11-18 | 2009-11-18 | Capacitive charge pump circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101764518A true CN101764518A (en) | 2010-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910198987A Pending CN101764518A (en) | 2009-11-18 | 2009-11-18 | Capacitive charge pump circuit |
Country Status (1)
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| CN (1) | CN101764518A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102629822A (en) * | 2012-03-30 | 2012-08-08 | 格科微电子（上海）有限公司 | Charge pump and liquid crystal display screen driving chip |
| WO2012149676A1 (en) * | 2011-05-03 | 2012-11-08 | University Of Science And Technology Of China | Switched capacitor charge pump driver for piezoelectric actuator |
| CN103730161A (en) * | 2013-12-23 | 2014-04-16 | 深圳国微技术有限公司 | Attack-resistant safety circuit of safety chip and safety chip by adopting safety circuit |
| US9077238B2 (en) | 2013-06-25 | 2015-07-07 | SanDisk Technologies, Inc. | Capacitive regulation of charge pumps without refresh operation interruption |
| US9083231B2 (en) | 2013-09-30 | 2015-07-14 | Sandisk Technologies Inc. | Amplitude modulation for pass gate to improve charge pump efficiency |
| US9154027B2 (en) | 2013-12-09 | 2015-10-06 | Sandisk Technologies Inc. | Dynamic load matching charge pump for reduced current consumption |
| CN103329414B (en) * | 2010-12-20 | 2016-10-12 | 桑迪士克科技有限责任公司 | It is dynamically selected the charge pump system of the quantity of active level |
| US9520776B1 (en) | 2015-09-18 | 2016-12-13 | Sandisk Technologies Llc | Selective body bias for charge pump transfer switches |
| US9647536B2 (en) | 2015-07-28 | 2017-05-09 | Sandisk Technologies Llc | High voltage generation using low voltage devices |
| US9917507B2 (en) | 2015-05-28 | 2018-03-13 | Sandisk Technologies Llc | Dynamic clock period modulation scheme for variable charge pump load currents |
| CN108417239A (en) * | 2017-02-09 | 2018-08-17 | 华大半导体有限公司 | Charge pump suitable for memory exports bleeder circuit |
-
2009
- 2009-11-18 CN CN200910198987A patent/CN101764518A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103329414B (en) * | 2010-12-20 | 2016-10-12 | 桑迪士克科技有限责任公司 | It is dynamically selected the charge pump system of the quantity of active level |
| USRE46263E1 (en) | 2010-12-20 | 2017-01-03 | Sandisk Technologies Llc | Charge pump system that dynamically selects number of active stages |
| WO2012149676A1 (en) * | 2011-05-03 | 2012-11-08 | University Of Science And Technology Of China | Switched capacitor charge pump driver for piezoelectric actuator |
| US9093925B2 (en) | 2011-05-03 | 2015-07-28 | University Of Science And Technology Of China | Switched capacitor charge pump driver for piezoelectric actuator |
| 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 |
| 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 |
| CN102629822A (en) * | 2012-03-30 | 2012-08-08 | 格科微电子（上海）有限公司 | Charge pump and liquid crystal display screen driving chip |
| US9077238B2 (en) | 2013-06-25 | 2015-07-07 | SanDisk Technologies, Inc. | Capacitive regulation of charge pumps without refresh operation interruption |
| US9083231B2 (en) | 2013-09-30 | 2015-07-14 | Sandisk Technologies Inc. | Amplitude modulation for pass gate to improve charge pump efficiency |
| US9154027B2 (en) | 2013-12-09 | 2015-10-06 | Sandisk Technologies Inc. | Dynamic load matching charge pump for reduced current consumption |
| CN103730161A (en) * | 2013-12-23 | 2014-04-16 | 深圳国微技术有限公司 | Attack-resistant safety circuit of safety chip and safety chip by adopting safety circuit |
| CN103730161B (en) * | 2013-12-23 | 2017-06-06 | 深圳国微技术有限公司 | A kind of safety circuit of safety chip attack resistance and the safety chip using the safety circuit |
| US9917507B2 (en) | 2015-05-28 | 2018-03-13 | Sandisk Technologies Llc | Dynamic clock period modulation scheme for variable charge pump load currents |
| US9647536B2 (en) | 2015-07-28 | 2017-05-09 | Sandisk Technologies Llc | High voltage generation using low voltage devices |
| US9520776B1 (en) | 2015-09-18 | 2016-12-13 | Sandisk Technologies Llc | Selective body bias for charge pump transfer switches |
| CN108417239A (en) * | 2017-02-09 | 2018-08-17 | 华大半导体有限公司 | Charge pump suitable for memory exports bleeder circuit |
| CN108417239B (en) * | 2017-02-09 | 2021-03-12 | 华大恒芯科技有限公司 | Charge pump output voltage-dividing circuit suitable for memory |
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Application publication date: 20100630 |