CN108306502A - Charge pump circuit and apply its electronic device - Google Patents
Charge pump circuit and apply its electronic device Download PDFInfo
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- CN108306502A CN108306502A CN201810124850.0A CN201810124850A CN108306502A CN 108306502 A CN108306502 A CN 108306502A CN 201810124850 A CN201810124850 A CN 201810124850A CN 108306502 A CN108306502 A CN 108306502A
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- energy
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- storage units
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
Abstract
The embodiment of the present application provides a kind of charge pump circuit and applies its electronic device, wherein, charge pump circuit, including the first branch, first energy-storage units and detection unit, the first branch includes multiple first switch devices, the first branch is used to make the first energy-storage units be in by the switch motion cooperation of the multiple first switch device to be electrically charged state, the detection unit is used to be detected at least to coordinate for changing the switch motion of the multiple first switch device the electric signal of test side in the first energy-storage units, so that the pressure difference in the first energy-storage units between test side meets preset electric signal threshold value, so that charge pump circuit output level is higher than the drive signal of supply voltage.
Description
Technical field
The invention relates to field of circuit technology more particularly to a kind of charge pump circuit and using its electronics dress
It sets.
Background technology
In order under the premise of not sacrificing driving capability, while power chip area and cost are reduced, has a kind of method just
It is power tube as small as possible in size to be selected under the premise of with identical conducting resistance, and just need to provide thus higher
The power tube that supply voltage could make size smaller is opened.For example, if traditional power chip includes power tube PMOS,
Under the premise of with identical conducting resistance, since the size of power NMOS tube is much smaller, especially answered in more and more products
When realizing high voltage, big driving capability and lower cost with all demand D-type power amplifiers and motor driving constant power chip,
In high pressure DMOS techniques, the power DNMOS pipes meeting specific power DPMOS pipes of identical conducting resistance are three or four times small, in this way can be real
The largely reduction of existing chip area, while process on mask version (mask) can also be avoided, to reduce cost.But
As previously mentioned, this, which just needs to provide higher driving voltage, could open power DNMOS pipes.
It would therefore be highly desirable to provide a kind of technical solution, size is selected when reducing power chip area and cost with effective solution
Smaller power pipe and the problem of need more high driving voltage.
Invention content
In view of this, one of the technical issues of the embodiment of the present application is solved is to provide a kind of charge pump circuit and application
Its electronic device, to provide higher driving voltage for the smaller power tube of size.
The embodiment of the present application provides a kind of charge pump circuit comprising：The first branch, first energy-storage units and detection
Unit, the first branch include multiple first switch devices, and the first branch is for passing through the multiple first switch device
The switch motion cooperation of part makes the first energy-storage units be in the state that is electrically charged, and the detection unit is used for first storage
The electric signal of test side is detected in energy unit is matched with the switch motion at least for changing the multiple first switch device
It closes so that the pressure difference in the first energy-storage units between test side meets preset electric signal threshold value.
The embodiment of the present application also provides a kind of electronic devices comprising charge pump circuit as described above.
The charge pump circuit of the embodiment of the present application and apply its electronic device, wherein charge pump circuit includes first
Road, first energy-storage units and detection unit, the first branch include multiple first switch devices, and the first branch is used for
So that the first energy-storage units is in by the switch motion cooperation of the multiple first switch device and is electrically charged state, the inspection
Unit is surveyed to be used to be detected at least for changing the multiple the electric signal of test side in the first energy-storage units
The switch motion of one switching device coordinates so that the pressure difference in the first energy-storage units between test side meets preset telecommunications
Number threshold value is higher than the drive signal of supply voltage so as to output level, with effective solutions reduction power chip area and at
The problem of this when, selects size smaller power pipe and needs more high driving voltage.
Description of the drawings
Some of detailed description the embodiment of the present application by way of example rather than limitation with reference to the accompanying drawings hereinafter are specific
Embodiment.Identical reference numeral denotes same or similar component or part in attached drawing.Those skilled in the art should manage
Solution, the drawings are not necessarily drawn to scale.In attached drawing：
Fig. 1 is a kind of structural schematic diagram of charge pump circuit provided by the embodiments of the present application；
Fig. 2 is the sequence diagram of Fig. 1；
Fig. 3 is a kind of structural schematic diagram of detection circuit provided by the embodiments of the present application；
Fig. 4 is the sequence diagram of Fig. 3.
Specific implementation mode
Implementing any technical solution of the embodiment of the present application must be not necessarily required to reach simultaneously above all advantages.
In order to make those skilled in the art more fully understand the technical solution in the embodiment of the present application, below in conjunction with the application
Attached drawing in embodiment, technical solutions in the embodiments of the present application are clearly and completely described, it is clear that described reality
It is the embodiment of the present application a part of the embodiment to apply example only, instead of all the embodiments.Based on the implementation in the embodiment of the present application
Example, the every other embodiment that those of ordinary skill in the art are obtained should all belong to the range of the embodiment of the present application protection.
Further illustrate that the embodiment of the present application implements with reference to the embodiment of the present application attached drawing.
Fig. 1 is a kind of structural schematic diagram of charge pump circuit provided by the embodiments of the present application, as shown in Figure 1 comprising：The
One branch, first energy-storage units and detection unit.
The first branch includes multiple first switch devices, and the first branch is for passing through the multiple first switch
The switch motion cooperation of device makes the first energy-storage units be in the state that is electrically charged, and the detection unit is used for described first
Pressure difference in energy-storage units between test side is detected at least to be moved for changing the switch of the multiple first switch device
Work coordinates so that the pressure difference in the first energy-storage units between test side meets preset electric signal threshold value.
In the present embodiment, first switch device can be individual metal-oxide-semiconductor, or individual field-effect tube, this reality
Example is applied herein without limiting.
In the present embodiment, the first energy-storage units can be a first capacitance C1, at this point, the first capacitance C1
As the test side, the pressure difference is the voltage at the both ends (i.e. positive terminal VP and reverse side VN) of the first capacitance C1 at both ends
Difference.Certainly, first energy-storage units may be the component of other forms, such as the first energy-storage travelling wave tube can be multiple capacitance strings
Connection or the accumulator in parallel formed.
In the present embodiment, by the way that the first branch, first energy-storage units, detection unit is arranged, first can be easily controlled
Pressure difference in energy-storage units between test side meets preset electric signal threshold value so that charge pump circuit can provide it is higher
, the driving voltage stablized, with reducing power chip area and under conditions of cost, for the smaller power tube of size provide compared with
High driving voltage.
In the present embodiment, as shown in Figure 1, the first branch includes three first switch device K5, K4, K2, described the
One one end switching device K5 connects supply voltage, and the first switch device K5 other ends are with the first switch device K4's
One end connects, and the other end of the first switch device K4 is connect with one end of the first energy-storage units, first storage
The other end of energy unit is connect with one end of the first switch device K2, another termination of the first switch device K2
Ground.
In the present embodiment, the switch motion of first switch device K5 is controlled by second switch signal CLK2, first switch device
The switch motion of part K2, first switch device K4 are controlled by first switch signal CLK1, first switch signal CLK1, second switch
The sequence diagram of signal CLK2 is as shown in Fig. 2, specific control method embodiment as described below.
Specifically, first switch signal CLK1 can control first switch device K4, first switch device K2 conducting or
Shutdown, second switch signal CLK2 can control first switch device K5 conductings or shutdown, when three first switch devices are equal
It when conducting, can be charged for first energy-storage units by the supply voltage being connect with first switch device K5, make first storage
Energy unit, which is in, is electrically charged state.
Specifically, when the pressure difference between test side during detection unit is to the first energy-storage units is detected, if institute
When stating the pressure difference in first energy-storage units between two test sides and meeting preset electric signal threshold value, the CLK2 controls of second switch signal
First switch device K5 shutdowns processed are that energy-storage travelling wave tube charges to make supply voltage stop, so that the first energy storage list
Pressure difference in member between test side is maintained at preset electric signal threshold value.
In the present embodiment, detection unit can be amplifier etc., and the present embodiment is herein without limiting, as long as can determine institute
It states the pressure difference in first energy-storage units between two test sides and meets preset electric signal threshold value, the specific reality of detection unit
Existing mode can refer to following embodiments.
In the present embodiment, the electric signal threshold value is voltage differential signal, and the voltage differential signal is generated by voltage-stablizer.Specifically
Ground, voltage differential signal can be ultra low voltage difference signal, and corresponding, voltage differential signal can be generated by low-dropout regulator.
Specifically, in the present embodiment, voltage-stablizer may include amplifier OP1, bleeder circuit, mos pipes MOS1, capacitance C0.
The positive input of amplifier can be with input reference voltage VREF, the grid of the output end and mos pipes MOS1 of amplifier
Pole connects, and the drain electrode of mos pipes MOS1 connects the input terminal connection of the source electrode and bleeder circuit of supply voltage VDD, mos pipe MOS1, point
The output end of volt circuit and the inverting input of amplifier connect, to constitute backfeed loop.
In the present embodiment, bleeder circuit includes two concatenated divider resistance R1, R2, and one end of divider resistance R2 is partial pressure
The other end of the input terminal of circuit, R2 is grounded by R1, is the output of bleeder circuit between divider resistance R1 and divider resistance R2
End, output end are grounded by capacitance C0.
In the present embodiment, the output end of the source electrode of mos pipes MOS1 as voltage-stablizer, output voltage difference signal, voltage difference letter
The value of number VLDO is：
Wherein, VLDO represents the voltage value of voltage differential signal, and VREF represents the voltage value of reference voltage, R1, R2 generation respectively
The resistance value of table divider resistance R1, R2.
It, can the resistance value by adjusting resistance R1, R2 or the voltage by adjusting reference voltage V REF in the present embodiment
Value, to change the value of voltage differential signal VLDO, so as to change charge pump circuit output driving voltage value, and then can be with
So that the driving voltage of charge pump circuit output and the pressure difference of supply voltage are less than hitting by DNMOS pipes that charge pump circuit drives
Voltage is worn, so that DNMOS manages not breakdown damage.Specifically, as the high side that DNMOS pipes are thin gate oxide
When NMOS tube, the value of voltage differential signal VLDO can be made to be less than or equal to 5V.
In the present embodiment, charge pump circuit can also include：The second branch, the second branch include at least one second
Switching device, when the pressure difference in the first energy-storage units between test side meets preset electric signal threshold value, described second
The second switch device that branch includes is used to be coordinated with the switch motion of the multiple first switch device so that described the
One energy-storage units maintain the pressure difference between the first energy-storage units test side to meet the state of preset electric signal threshold value.
Specifically, in the present embodiment, second switch branch includes second switch device K6, one end of second switch device K6
It can be connect with the output end of above-mentioned voltage-stablizer, the other end is connect with one end of first switch device K4.The second switch device
The switch motion of part is controlled by third switching signal.
In the present embodiment, third switching signal can be the inversion signal (being denoted as CLK2N) of second switch signal, so as to
So that the switch motion of first switch device K5 and second switch device K6 are opposite.To be led as first switch device K5
When logical, second switch device K6 is turned off, first energy-storage units are in and are electrically charged state；When first switch device K5 shutdowns, second
When switching device K6 conductings, first energy-storage units are connected by the output end of second switch device K6 and voltage-stablizer, pass through voltage stabilizing
Device makes the pressure difference in the first energy-storage units between test side meet preset electric signal threshold value (such as voltage differential signal
VLDO)。
In the present embodiment, charge pump circuit can also include：Third branch, the third branch include multiple third switches
Device, the third branch are used to coordinate to the first energy-storage units by the switch motion of the multiple third switching device
Carry out discharge treatment so that the value of driving voltage is equal to the voltage between test side in supply voltage and the first energy-storage units
The sum of difference, i.e. charge pump circuit export higher driving voltage.
Specifically, in the present embodiment, the third branch includes two third switching devices K1, K3, the third switch
The one end device K1 connects supply voltage VDD, one end of the third switching device K1 other ends and the first energy-storage units
Connection, the other end of the first energy-storage units are connect with one end of the third switching device K3, and described two thirds are opened
Device K1, third switching device K3 conductings are closed to carry out discharge treatment to the first energy-storage units.
In the present embodiment, when first energy-storage units are the first capacitance C1, the one end third switching device K1 connects power supply electricity
Pressure, the other end connect the negative plate of the first capacitance C1, and the positive plate of the first capacitance C1 is connect with one end of third switching device K3,
So that when third switching device K1 is connected with third switching device K3, the first capacitance C1 is discharged by third switching device K3.
In the present embodiment, the switch motion of the multiple third switching device is controlled by same 4th switching signal.4th
Switching signal can be the inversion signal (and being denoted as CLK1N) of first switch signal, so that above-mentioned first switch device
K2, conducting state and the third switching device K1 of first switch device K4, third switching device K3 conducting state on the contrary, in turn
When can make first switch device K2, first switch device K4 conducting third switching devices K1, the K3 shutdowns of third switching device
First energy-storage units are in and are electrically charged state, first switch device K2, first switch device K4 shutdown third switching devices K1, the
First energy-storage units are in discharge condition, specific control method embodiment as described below when three switching device K3 conductings.
Further, in this embodiment charge pump circuit further includes：Second energy-storage units, the third branch pass through institute
The switch motion for stating multiple third switching devices coordinates so that the first energy-storage units put the second energy-storage units
Electricity.
Specifically, second energy-storage units can be the second capacitance C2, and one end of the second capacitance C2 passes through third switching device
K3 is connect with first energy-storage units, other end ground connection.
The third branch is coordinated by the switch motion of the multiple third switching device so that the first energy storage list
Member discharges to the second energy-storage units, and the value to control driving voltage is equal to the sum of supply voltage and electric signal threshold value,
Driving voltage is the driving voltage of charge pump circuit output.
Specifically, when third switching device K1 is connected with third switching device K3, first energy-storage units are opened by third
It closes device K3 to discharge to second energy-storage units, while being connect with supply voltage by third switching device K1 so that the second capacitance
Pressure difference between C2 and ground is the sum of supply voltage and electric signal threshold value, so that the value of driving voltage is equal to supply voltage
The sum of with electric signal threshold value.
Certainly, in the present embodiment, first switch device can control in other way, as long as the multiple first opens
The switch motion for closing part first switch device in device is controlled by first switch signal CLK1, another part first switch device
The switch motion of part is controlled by second switch signal CLK2, so as to pass through first switch signal CLK1 and second switch letter
Number CLK2 controls the switch motion cooperation of multiple first switch devices, so as to so that three first switch devices K5, K4,
K2 conducting make the first energy-storage units be in be electrically charged state.
In addition, in other implementations of the application, the quantity of first switch device can also be other numerical value, as long as institute
It states first energy-storage units to be arranged in the first branch, can be coordinated by the switch motion of the multiple first switch device
The first energy-storage units are made to be in the state that is electrically charged, the present embodiment is herein without limiting.
Below in conjunction with Fig. 2 shows clock signal, to first switch device K5, first switch device K4, first switch device
The conducting off state and the first capacitance of part K2, second switch device K6, third switching device K1, third switching device K3
C1, the second capacitance C2 charging and discharging state illustrate.
In the present embodiment, first switch device K2, first switch device K4 are controlled by first switch signal CLK1, third
The inversion signal CLK1N controls that switching device K1, third switching device K3 pass through first switch signal CLK1；First switch device
K5 is controlled by second switch signal CLK2, and second switch device K6 is controlled by the inversion signal CLK2N of second switch signal.
In the present embodiment, within the t1-t2 periods, first switch signal CLK1 is high level, its inversion signal is low electricity
Flat, second switch signal is high level, and inversion signal is low level.At this point, first switch device K5, first switch device
K4, first switch device K2 conducting, second switch device K6, third switching device K1, the K3 shutdowns of third switching device, at this time the
One capacitance C1 is in and is electrically charged state.
The pressure difference at t2 moment, the first test sides capacitance C1 meets preset electric signal threshold value, i.e. VLDO, at this point, first opens
OFF signal maintains high level, and second switch signal jumps to low level by high level, corresponding, the reverse phase letter of second switch signal
Number high level is jumped to by low level, and maintained to the t3 moment.Then within the t2-t3 periods, first switch device K5 shutdown, the
Two switching device K6 conductings, the first capacitance C1 is connect by second switch device K6 with voltage-stablizer, to pass through the defeated of voltage-stablizer
The pressure difference that outlet stablizes the first test sides capacitance C1 is VLDO.
T3 moment, second switch signal maintain low level, first switch signal to jump to low level by high level, corresponding
, the inversion signal of first switch signal jumps to high level by low level, and maintains to the t4 moment.Then in the t3-t4 periods
It is interior, first switch device K5, first switch device K4, the K2 shutdowns of first switch device, second switch device K6, third derailing switch
Part K1, the K3 conductings of third switching device, the first capacitance C1 is in discharge condition at this time.
At this point, C1 pairs of the second capacitance C2 electric discharge of the first capacitance, while by switching third switching device K1, third derailing switch
Part K3 so that voltage-to-ground value (i.e. the output voltage of charge pump circuit) VREG of the second capacitance C2 is：
VREG=VDD+VLDO
According to above-mentioned formula it is found that voltage-to-ground value (i.e. the output voltage of charge pump circuit) VREG of the second capacitance C2
For：
T4 moment, first switch signal jump to high level by low level, and trigger second switch signal and jumped by low level
High level is gone to, it is made to be repeated with the t1 moment, is subsequently to be repeated in a period with t1-t4.
It should be noted that above-described embodiment is merely exemplary to explain, above-mentioned technical proposal can also be applied to any
It needs to provide the scene compared with high power supply voltage.
The embodiment of the present application also provides a kind of electronic device comprising charge pump circuit as described above.
Fig. 3 is a kind of structural schematic diagram of detection circuit provided by the embodiments of the present application, as shown in Figure 3 comprising：4th
Branch, the 5th branch, third energy-storage units.
4th branch includes multiple 4th switching devices, and the 5th branch includes multiple 5th switching devices；Institute
The 4th branch is stated to sample preset electric signal threshold value for by the switch of the multiple 4th switching device coordinating
The third energy-storage units, the 5th branch are used to coordinate the first energy storage by the switch of the multiple 5th switching device
Pressure difference between the test side of unit samples the third energy-storage units, between the test side pressure difference with it is default
Electric signal threshold value.
In the present embodiment, the 4th branch includes two the 4th switching devices K7, K9, and the third energy-storage units are located at described
The 4th road that two the 4th switching device K7, the 4th switching device K9 are formed.
Specifically as shown in figure 3, the 4th branch includes PMOS tube P1, the 4th switching device K7 and the 4th as power tube
Switching device K9.Third energy-storage units can be third capacitance C3.
Wherein, the drain electrode of power tube P1 is for accessing preset electric signal threshold value, the grid and source electrode of power tube P1
Connection, the source electrode of power tube P1 are connect with one end of the 4th switching device K7 so that one end of the 4th switching device K7 is logical
Overpower pipe P1 accesses preset electric signal threshold value, and the other end of the 4th switching device K7 connects with one end of third capacitance C3
It connects, the other end of third capacitance C3 is by the 4th switching device K9 ground connection, to form the 4th branch.
When sampling, the 4th switching device K7 is connected with the 4th switching device K9 so that preset electric signal threshold value
It is sampled to third capacitance C3 by the cooperation of power tube P1, the 4th switching device K7, the 4th switching device K9 so that third capacitance
The grid level value that voltage difference between two pole plates of C3 is power tube P1.
In the present embodiment, as shown in figure 3, the 5th branch includes the 5th switching device K8, K10, the third energy-storage units
Positioned at the 5th road that described two 5th switching devices (K8, K10) are formed.
Specifically as shown in figure 3, the 5th branch includes the PMOS tube P2 as power tube, the 5th switching device K8, K10, the
Three energy-storage units are similarly third capacitance C3.
Wherein, one end of the 5th switching device K8 is connected to the reverse side VN of the first capacitance C1, the 5th switching device K8's
The other end is connected to one end of third capacitance C3, is connect with one end of third capacitance C3, the other end and power of third capacitance C3
The grid of pipe P2 connects, and the drain electrode of power tube P2 is connect with one end of the 5th switching device K10, and the 5th switching device K10's is another
One end is connect with the positive terminal VP of the first capacitance C1.
When the pressure difference between the test side to first energy-storage units samples, above-mentioned 4th switching device K7, the 4th
Switching device K9 shutdowns, and the 5th switching device K8 of switch, the 5th switching device K10 conductings so that the grid of power tube P2
Level value is the sum of the voltage difference at the both ends reverse side VN and third capacitance C3 of the first capacitance C1, to pass through the multiple 5th
The switch of switching device coordinates samples the third energy-storage units by the pressure difference between the test side of first energy-storage units.
The source electrode of above-mentioned power tube P1 and power tube P2 can be grounded by current lens unit, current lens unit conduct
The active load of above-mentioned power tube P1 and power tube P2, the output end of the source electrode of power tube P2 as detection circuit, output inspection
Survey result.
After the completion of sampling, you can the pressure difference between the test side and preset electric signal threshold value, to described
The pressure difference of test side is detected in first energy-storage units, judges whether it meets preset electric signal threshold value.
Detection circuit provided in this embodiment may be implemented the pressure difference between the test side by double sampling and preset
Electric signal threshold value superposition, can truely and accurately determine the pressure difference of first energy-storage units test side and by itself and electric signal threshold
Value is compared, and then determines accurate testing result.
For example, in above-mentioned charge pump circuit, since first switch device K2 exists, first switch device K2 is deposited when being connected
In conducting resistance so that the level value of first energy-storage units reverse side VN is higher than the level value (can be 0V) on ground, so that
If the only voltage at the ends acquisition first energy-storage units positive terminal VP, can not correctly determine the pressure of first energy-storage units test side
Difference, therefore, in the present embodiment, detection unit by double sampling, may be implemented pressure difference between the test side with it is preset
The superposition of electric signal threshold value, and then can truely and accurately determine the pressure difference of first energy-storage units test side, and by itself and telecommunications
Number threshold value is compared, and to prevent the influence such as the resistance of above-mentioned first switch device K2 to test side, it is accurate to obtain
Ground testing result.
In other implementations of the present embodiment, detection circuit further includes：Compensating unit 31, for generating compensation telecommunications
Number, the compensation electric signal is for preventing the first energy-storage units to be overcharged.
Specifically, the compensating unit 31 of detection circuit may include NMOS tube N1, N2, N3 as power tube, N1, N2,
The grid of N3 is connect with driving voltage VB, source grounding, and the drain electrode of power tube N1 is connect with the source electrode of above-mentioned power tube P1,
So that power tube P1 is grounded by power tube N1, the drain electrode of power tube N2, power tube N3 are connect with the source electrode of above-mentioned power tube P2,
Power tube P2 is allow to pass through power tube N2, power tube N3 ground connection, the wherein width of power tube N1, power tube N2, power tube N3
The ratio of long ratio is 1：n1：The ratio of the breadth length ratio of n2, above-mentioned power tube P1, power tube P2 is 1：M makes m in setting>
(n1+n2), and then it can so that above-mentioned detection circuit includes offset voltage VOS (offset voltage), so as to logical
Offset voltage is crossed as compensation electric signal, compared result compensates, and then prevents the first energy-storage units from excessively being filled
Electricity.
The principle that offset voltage compensates is as follows：
In the present embodiment, the size of the offset voltage VOS of generation can be determined according to the time of circuit delay, offset voltage
Size be in the time range for prolonging circuit delay the test side pressure difference of first energy-storage units increment.
Specifically, according to foregoing circuit it is found that when output end exports low level (i.e. pressure of the judging result between test side
Difference is greater than or equal to preset electric signal threshold value) when, VP-VN>=VLDO-VOS.
Wherein, pressure differences of the VP-VN between test side, the preset electric signal threshold values of VLDO, VOS are that offset voltage (is mended
Repay electric signal).
According to above-mentioned formula it is found that as the VOS smaller than preset electric signal threshold value of the pressure difference between test side, you can to sentence
Disconnected pressure difference of the result for test side between is greater than or equal to preset electric signal threshold value, so control first energy-storage units no longer by
Charging.
In the present embodiment, when detection circuit is applied with charge pump circuit in Fig. 1, since detection circuit is described in comparison
Pressure difference between test side and preset electric signal threshold value, then control first energy-storage units are no longer electrically charged according to testing result
During, certain circuit delay is had, first energy-storage units is caused to be overcharged, is i.e. VP-VN>VLDO may be led
Cause the driving voltage of charge pump circuit output excessively high, and then breakdown power DNMOS pipes.Therefore it in the present embodiment, is mended by being arranged
Unit 31 is repaid, can be overcome the problems, such as above-mentioned since first energy-storage units caused by circuit delay are overcharged.
Certainly, in other realization methods of the application, offset voltage can also be generated by other compensating units 31；Or
Person, compensating unit 31 not only can generate thermal compensation signal by way of above-mentioned generation offset voltage, can also pass through its other party
Formula is realized, as long as thermal compensation signal can be used in that the first energy-storage units is prevented to be overcharged, the present embodiment is herein not
It is defined.
In addition, in another embodiment of the application, in order to according to the output of detection circuit control first energy-storage units no longer by
Charging, detection circuit further include control unit 32, described control unit 32 be used for according between the test side electric signal with
The comparison result of preset electric signal threshold value at least generates second switch signal, and the second switch signal is for controlling the first storage
Energy unit stopping is electrically charged.
Specifically, due in above-described embodiment output end export low level when, pressure difference of the judging result between test side
It more than or equal to preset electric signal threshold value, then controls first energy-storage units and stops charging, and control the first energy storage list in Fig. 1
It is first switch device K5 that member, which is electrically charged, the switch that control first energy-storage units are no longer electrically charged is second switch device K6.
Therefore in the present embodiment, control unit 32 includes phase inverter and drive module, and phase inverter is for carrying out above-mentioned comparison result
Reverse phase processing, is converted into high level signal, and drive module is opened at least generating second according to the comparison result after reverse phase
OFF signal stops to controlling first switch device K5 shutdowns, the K6 conductings of second switch device to control first energy-storage units
Charging.Specifically, when first switch device K5, second switch device K6 are metal-oxide-semiconductor, drive module can be gate driving mould
Block.Certainly, in other realizations of the present embodiment, the reverse phase that can also generate second switch signal simultaneously by drive module is believed
Number.
Fig. 4 is the corresponding sequence diagram of above-mentioned detection circuit, below in conjunction with the sequence diagram shown in Fig. 4, to according to detection circuit
Output control first energy-storage units be no longer electrically charged and illustrate.
In the present embodiment, first switch device K2, first switch device K4, the 5th switching device K8, the 5th switching device
K10 is controlled by first switch signal CLK1, third switching device K1, third switching device K3, the 4th switching device K7, the 4th
The inversion signal CLK1N controls that switching device K9 passes through first switch signal CLK1；First switch device K5 passes through second switch
Signal controls, and second switch device K6 is controlled by the inversion signal of second switch signal.
In the present embodiment, within the t1-t2 periods, first switch signal CLK1 is high level, its inversion signal is low electricity
Flat, second switch signal is high level, and inversion signal is low level.At this point, first switch device K5, first switch device
K4, first switch device K2, the 4th switching device K7, the 4th switching device K9 conductings, second switch device K6, third derailing switch
Part K1, the K3 shutdowns of third switching device, the first capacitance C1 is in and is electrically charged state at this time, and detection circuit passes through the 4th derailing switch
Part K7, the 4th switching device K9 sample preset electric signal threshold value to third capacitance C3.
At the t2 ' moment, the pressure differences of the first test sides capacitance C1 meets preset electric signal threshold value, i.e. VLDO-VOS, at this point,
Control module changes the level value of second switch signal according to the output of detection circuit, it is made to jump to low level by high level.
T2-t2 ' is the time of circuit delay.
By the time of circuit delay, when second switch signal jumps to low level electric signal control first by high level
Switching device K5 is turned off, the inversion signal of second switch signal jumps to high level control second switch device K6 by low level and leads
When logical, the first capacitance C1 just can energy storage VOS again, that is, the pressure difference of the first capacitance C1 is VLDO, and the first capacitance C1 is logical at this time
It crosses second switch device K6 to connect with voltage-stablizer, to stablize the pressure difference of the first test sides capacitance C1 by the output end of voltage-stablizer
For VLDO.
The pressure difference at t2 moment, the first test sides capacitance C1 meets preset electric signal threshold value, i.e. VLDO, at this point, first opens
OFF signal maintains high level, and second switch signal jumps to low level by high level, corresponding, the reverse phase letter of second switch signal
Number high level is jumped to by low level, and maintained to the t3 moment.Then within the t2-t3 periods, first switch device K5 shutdown, the
Two switching device K6 conductings, the first capacitance C1 is connect by second switch device K6 with voltage-stablizer, to pass through the defeated of voltage-stablizer
The pressure difference that outlet stablizes the first test sides capacitance C1 is VLDO.
T3 moment, second switch signal maintain low level, first switch signal to jump to low level by high level, corresponding
, the inversion signal of first switch signal jumps to high level by low level, and maintains to the t4 moment.Then in the t3-t4 periods
It is interior, first switch device K5, first switch device K4, the K2 shutdowns of first switch device, second switch device K6, third derailing switch
Part K1, the K3 conductings of third switching device, the first capacitance C1 is in discharge condition at this time.
It should be noted that above-described embodiment is merely exemplary to explain, above-mentioned technical proposal can also be applied to any
Need the scene of progress voltage detecting.
The embodiment of the present application also provides a kind of electronic device comprising detection circuit as described above.
The apparatus embodiments described above are merely exemplary, wherein the module illustrated as separating component can
It is physically separated with being or may not be, the component shown as module may or may not be physics mould
Block, you can be located at a place, or may be distributed on multiple network modules.It can be selected according to the actual needs
In some or all of module achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case of, you can to understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It is realized by the mode of software plus required general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be expressed in the form of software products in other words, should
Computer software product can store in a computer-readable storage medium, the computer readable recording medium storing program for performing include for
Any mechanism of the readable form storage of computer (such as computer) or transmission information.For example, machine readable media includes only
Read memory (ROM), random access memory (RAM), magnetic disk storage medium, optical storage media, flash medium, electricity, light,
The transmitting signal (for example, carrier wave, infrared signal, digital signal etc.) etc. of sound or other forms, which includes
Some instructions are used so that a computer equipment (can be personal computer, server or the network equipment etc.) executes respectively
Method described in certain parts of a embodiment or embodiment.
Finally it should be noted that：Above example is only to illustrate the technical solution of the embodiment of the present application, rather than limits it
System；Although the application is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its
Still can be with technical scheme described in the above embodiments is modified, or which part technical characteristic is equal
It replaces；And these modifications or replacements, each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution
Spirit and scope.
It will be understood by those skilled in the art that the embodiments of the present application may be provided as method, apparatus (equipment) or
Computer program product.Therefore, the embodiment of the present application can be used complete hardware embodiment, complete software embodiment or combine soft
The form of the embodiment of part and hardware aspect.Moreover, it wherein includes to calculate that the embodiment of the present application, which can be used in one or more,
The computer-usable storage medium of machine usable program code (includes but not limited to magnetic disk storage, CD-ROM, optical memory
Deng) on the form of computer program product implemented.
The embodiment of the present application is with reference to the method, apparatus (equipment) and computer program product according to the embodiment of the present application
Flowchart and/or the block diagram describes.It should be understood that can be realized by computer program instructions every in flowchart and/or the block diagram
The combination of flow and/or box in one flow and/or box and flowchart and/or the block diagram.These computers can be provided
Processor of the program instruction to all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices
To generate a machine so that the instruction executed by computer or the processor of other programmable data processing devices generates use
In the dress for realizing the function of being specified in one flow of flow chart or multiple flows and/or one box of block diagram or multiple boxes
It sets.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Claims (14)
1. a kind of charge pump circuit, which is characterized in that including：The first branch, first energy-storage units and detection unit, described
One branch includes multiple first switch devices, and the first branch is used for the switch motion by the multiple first switch device
Cooperation makes the first energy-storage units be in the state that is electrically charged, and the detection unit is used for being detected in the first energy-storage units
The electric signal at end is detected at least to coordinate for changing the switch motion of the multiple first switch device so that described the
Pressure difference in one energy-storage units between test side meets preset electric signal threshold value.
2. circuit according to claim 1, which is characterized in that part first switch device in the multiple first switch device
The switch motion of part is controlled by first switch signal, and the switch motion of another part first switch device is by second switch signal
Control.
3. circuit according to claim 1, which is characterized in that the first branch include three first switch devices (K5,
K4, K2), described first switch device (K5) one end connects supply voltage, first switch device (K5) other end and institute
State one end connection of first switch device (K4), other end and the first energy-storage units of the first switch device (K4)
One end connection, the other end of the first energy-storage units connect with one end of the first switch device (K2), described the
The other end of one switching device (K2) is grounded, and three first switch devices (K5, K4, K2), which are closed, makes the first energy storage list
Member is in and is electrically charged state.
4. circuit according to claim 1, which is characterized in that the electric signal threshold value is voltage differential signal, the voltage
Difference signal is generated by low-dropout regulator.
5. circuit according to claim 1, which is characterized in that the first energy-storage units are arranged in the first branch
On, it is electrically charged state to make the first energy-storage units be in by the switch motion of the multiple first switch device cooperation.
6. circuit according to claim 1, which is characterized in that when the first energy-storage units include first capacitance,
As the test side, the pressure difference in the first energy-storage units between test side is described first at the both ends of first capacitance
The voltage difference at the both ends of capacitance.
7. circuit according to claim 1, which is characterized in that further include：The second branch, the second branch include at least
One second switch device, when the pressure difference in the first energy-storage units between test side meets preset electric signal threshold value,
The switch motion that the second switch device that the second branch includes is used for the multiple first switch device is coordinated, and is made
Obtaining the first energy-storage units maintains the pressure difference between the first energy-storage units test side to meet preset electric signal threshold value
State.
8. circuit according to claim 7, which is characterized in that the switch motion of the second switch device is switched by third
Signal controls.
9. circuit according to claim 1, which is characterized in that further include：Third branch, the third branch includes multiple
Third switching device, the third branch are used to coordinate to described first by the switch motion of the multiple third switching device
Energy-storage units carry out discharge treatment.
10. circuit according to claim 9, which is characterized in that the third branch includes two third switching devices
(K1, K3), described third switching device (K1) one end connect supply voltage, third switching device (K1) other end and institute
State one end connection of first energy-storage units, the other end of the first energy-storage units and the one of the third switching device (K3)
End connects, and first energy-storage units described in described two third switching device (K1, K3) closed pairs carry out discharge treatment.
11. circuit according to claim 9, which is characterized in that the switch motion of the multiple third switching device is by same
One the 4th switching signal controls.
12. circuit according to claim 9, which is characterized in that further include：Second energy-storage units, the third branch are logical
Cross the multiple third switching device switch motion coordinate so that the first energy-storage units to the second energy-storage units into
Row electric discharge.
13. circuit according to claim 12, which is characterized in that the third branch passes through the multiple third derailing switch
The switch motion of part coordinates so that the first energy-storage units discharge to the second energy-storage units, to control driving voltage
Value be equal in supply voltage and the first energy-storage units the sum of the voltage difference between test side.
14. a kind of electronic device, which is characterized in that including such as claim 1-13 any one of them charge pump circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810124850.0A CN108306502B (en) | 2018-02-07 | 2018-02-07 | Charge pump circuit and electronic device using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810124850.0A CN108306502B (en) | 2018-02-07 | 2018-02-07 | Charge pump circuit and electronic device using same |
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| CN108306502A true CN108306502A (en) | 2018-07-20 |
| CN108306502B CN108306502B (en) | 2020-06-05 |
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| CN201810124850.0A Active CN108306502B (en) | 2018-02-07 | 2018-02-07 | Charge pump circuit and electronic device using same |
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Cited By (1)
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| CN110784670A (en) * | 2018-07-30 | 2020-02-11 | 奕景科技(香港)有限公司 | Solid-state imaging device, method for driving solid-state imaging device, and electronic apparatus |
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| US20050135125A1 (en) * | 2003-12-22 | 2005-06-23 | Meng-Jyh Lin | [charge-pump circuitry] |
| CN101694961A (en) * | 2009-09-18 | 2010-04-14 | 和芯微电子(四川)有限公司 | Low ripple wave boosting type charge pump |
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| CN110784670A (en) * | 2018-07-30 | 2020-02-11 | 奕景科技(香港)有限公司 | Solid-state imaging device, method for driving solid-state imaging device, and electronic apparatus |
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| Publication number | Publication date |
|---|---|
| CN108306502B (en) | 2020-06-05 |
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