CN102223060A - Voltage boosting circuit - Google Patents

Voltage boosting circuit Download PDF

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Publication number
CN102223060A
CN102223060A CN2010101467840A CN201010146784A CN102223060A CN 102223060 A CN102223060 A CN 102223060A CN 2010101467840 A CN2010101467840 A CN 2010101467840A CN 201010146784 A CN201010146784 A CN 201010146784A CN 102223060 A CN102223060 A CN 102223060A
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CN
China
Prior art keywords
voltage
lifting circuit
switching tube
input
resistance
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2010101467840A
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Chinese (zh)
Inventor
鲁建辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
Original Assignee
Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hongfujin Precision Industry Shenzhen Co Ltd, Hon Hai Precision Industry Co Ltd filed Critical Hongfujin Precision Industry Shenzhen Co Ltd
Priority to CN2010101467840A priority Critical patent/CN102223060A/en
Publication of CN102223060A publication Critical patent/CN102223060A/en
Pending legal-status Critical Current

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Abstract

The invention provides a voltage boosting circuit that is used for boosting an input voltage provided by an external voltage source and generating a load voltage with greater voltage value than the input voltage. The voltage boosting circuit comprises a voltage generating unit, a switch unit and an energy storage unit, wherein the voltage generating unit is used for generating a pulse voltage based on the input voltage; the switch unit is connected between the voltage source and the energy storage unit; the switch unit is used for storing the electric energy provided by the voltage source in the energy storage unit when the pulse voltage is arranged at a first level; the switch unit is also used for transmitting the input voltage provided by the voltage source to the energy storage unit when the pulse voltage is arranged at a second level; and the energy storage unit is used for outputting the input voltage by an output terminal of the voltage boosting circuit and simultaneously releasing the electric energy stored in the output terminal so as to form the load voltage at the output terminal.

Description

Voltage lifting circuit
Technical field
The present invention relates to electronic technology field, particularly a kind of voltage lifting circuit.
Background technology
Existing voltage lifting circuit generally includes pulse-width modulation (PWM, Pulse WidthModulation) controller, inductance, metal-oxide-semiconductor, diode and output.One end of this inductance connects voltage source V i, and the other end connects the drain electrode of metal-oxide-semiconductor.The grid of this metal-oxide-semiconductor connects PWM controller, source ground.The anode of this diode connects the drain electrode of metal-oxide-semiconductor, and negative electrode connects output.
The PWM controller is used to produce the grid that pulse signal is given metal-oxide-semiconductor, at the rising edge of this pulse signal, and the metal-oxide-semiconductor conducting, inductance begins the electric energy of stored voltage source Vi input.At the trailing edge of this pulse signal, metal-oxide-semiconductor ends, and owing to the inductance energy stored begins to discharge by diode, thereby the voltage Vo of output output will be bigger than Vi, reached the effect of boosting.
Yet the size of this inductance is bigger, causes the integration of voltage lifting circuit relatively poor.
Summary of the invention
Given this, be necessary to provide a kind of integration voltage lifting circuit preferably.
A kind of voltage lifting circuit is used for the input voltage that external voltage source provides is promoted, and produces the magnitude of voltage load voltage bigger than input voltage.This voltage lifting circuit comprises the voltage generation unit, switch element and energy-storage units, this voltage generation unit is used for producing pulse voltage based on this input voltage, this switch element is connected between voltage source and the energy-storage units, the electrical power storage that this switch element is used for when this pulse voltage is in first level voltage source being provided is in energy-storage units, the input voltage that this switch element also is used for when pulse voltage is in second level voltage source being provided is passed to energy-storage units, this energy-storage units is used for exporting this input voltage also discharges its storage simultaneously by this output electric energy by the output of voltage lifting circuit, to form load voltage at output.
Above-mentioned voltage lifting circuit utilizes energy-storage units to replace inductance, the input voltage that the magnitude of voltage of the load voltage that voltage lifting circuit produces is obviously provided greater than external voltage source, and can make the integration of voltage lifting circuit better.
Description of drawings
Fig. 1 is the functional block diagram of the voltage lifting circuit of a better embodiment.
Fig. 2 is the physical circuit figure of voltage lifting circuit among Fig. 1.
The main element symbol description
Voltage lifting circuit 100
Output 102
Voltage generation unit 12
Switch element 14
Energy-storage units 16
Feedback unit 18
Filter unit 20
Voltage source 200
Input voltage Vi
Load voltage Vo
Schmidt trigger U1
First resistance R 1
First capacitor C 1
The first switching tube Q1
Comparator U2
Second switch pipe Q2
The 3rd switching tube Q3
Diode D1
Second capacitor C 2
Second resistance R 2
The 3rd resistance R 3
The 3rd capacitor C 3
Embodiment
See also Fig. 1, the magnitude of voltage that the voltage lifting circuit 100 of a better embodiment is used for input voltage Vi that external voltage source 200 is provided promotes, producing load voltage Vo, and by output 102 output loading voltage Vo.The magnitude of voltage of load voltage Vo is greater than input voltage Vi.
Voltage lifting circuit 100 comprises voltage generation unit 12, switch element 14, energy-storage units 16, feedback unit 18 and filter unit 20.
Voltage generation unit 12 links to each other with voltage source 200, is used for producing a pulse voltage based on the input voltage Vi that voltage source 200 is provided, and this pulse voltage is offered switch element 14.
Switch element 14 is connected between voltage source 200 and the energy-storage units 16.The electrical power storage that switch element 14 is used for when this pulse voltage is in first level voltage source 200 being provided is at energy-storage units 16.The input voltage Vi that switch element 14 also is used for when pulse voltage is in second level voltage source 200 being provided is passed to energy-storage units 16, this energy-storage units 16 is used for also discharging by output simultaneously by output 102 this input voltage of output Vi the electric energy of its storage, thereby produces the magnitudes of voltage load voltage Vo bigger than input voltage Vi at output 102.
Feedback unit 18 is used for this load voltage is taken a sample with the generation feedback signal, and sends this feedback signal to voltage generation unit 12.Voltage generation unit 12 is used for adjusting based on feedback signal the duty ratio of pulse voltage, so that load voltage Vo keeps stable.Particularly, when load voltage Vo diminished, voltage generation unit 12 was transferred the duty ratio of the pulse voltage of its generation big, and it is longer also to be that pulse voltage is in time period of first level, thereby can regulate load voltage Vo bigger.When load voltage Vo became big, voltage generation unit 12 was turned the duty ratio of the pulse voltage of its generation down, and it is shorter also to be that pulse voltage is in time period of first level, thereby can regulate load voltage Vo less.Thus, can make load voltage Vo keep stable.
Filter unit 20 is used for load voltage Vo is carried out Filtering Processing, with filtering noise information.
See also Fig. 2, it is the physical circuit figure of voltage lifting circuit 100 among Fig. 1.
Voltage generation unit 12 comprises Schmidt trigger U1, first resistance R 1, first capacitor C 1, the first switching tube Q1 and comparator U2.First resistance R 1 and first capacitor C 1 are connected in series between voltage source 200 and the ground.The input of Schmidt trigger U1 is connected between first resistance R 1 and first capacitor C 1, and the output of Schmidt trigger U1 links to each other with the grid of the first switching tube Q1.The drain electrode of the first switching tube Q1 links to each other source ground with the input of Schmidt trigger U1.The inverting input of comparator U2 connects the drain electrode of the first switching tube Q1, and in-phase input end connects feedback unit 18, and the output of comparator U2 connects switch element 14.In the present embodiment, the first switching tube Q1 is the N-channel MOS pipe.
Switch element 14 comprises second switch pipe Q2 and the 3rd switching tube Q3, the base stage of second switch pipe Q2 links to each other with the output of the base stage of the 3rd switching tube Q3 and comparator U2, the emitter of this second switch pipe Q2 connects voltage source 200, the collector electrode of this second switch pipe Q2 connects the collector electrode of the 3rd switching tube Q3, the grounded emitter of the 3rd switching tube Q3, the collector electrode of this second switch pipe Q2 connects energy-storage units 16.In the present embodiment, second switch pipe Q2 is the positive-negative-positive triode, and the 3rd switching tube Q3 is a NPN type triode.
Energy-storage units 16 comprises the diode D1 and second capacitor C 2, the anode of this diode D1 connects voltage source 200, negative electrode connects the output 102 of voltage lifting circuit 100, one end of second capacitor C 2 is connected between the collector electrode of the collector electrode of second switch pipe Q2 and the 3rd switching tube Q3, and the other end connects the negative electrode of diode D1.
Feedback unit 18 comprises second resistance R 2 and the 3rd resistance R 3, this second resistance R 2 and the 3rd resistance R 3 are connected in series between output 102 and the ground, this voltage generation unit 12 comprises a feedback end, this feedback end is the reverse input end of comparator U2, and this feedback end is connected between second resistance R 2 and the 3rd resistance R 3.Second resistance R 2 and the 3rd resistance R 3 are used for load voltage Vo is taken a sample to produce feedback signal.
Filter unit 20 comprises that an end of the 3rd capacitor C 3, the three capacitor C 3 connects output 102, other end ground connection.
The operation principle of this voltage lifting circuit 100 is as follows:
When voltage lifting circuit 100 was started working, the input voltage Vi that voltage source 200 provides began by 1 charging of 1 pair first capacitor C of first resistance R, the charging voltage V when first capacitor C, 1 two ends C1When reaching the cut-in voltage of Schmidt trigger U1, Schmidt trigger U1 produces high level signal and makes the switching tube Q1 conducting of winning.The first switching tube Q1 conducting makes the charging voltage V at capacitor C 1 two ends of winning C1It is zero volt.Thereby Schmidt trigger U1 can not produce high level signal and make the switching tube Q1 conducting of winning, and voltage source 200 continues 1 charging of first capacitor C.The charging voltage V at first capacitor C, 1 two ends C1Be applied to the input in the same way of comparator U2, as charging voltage V C1During greater than the voltage of the reverse input end of comparator U2, comparator U2 produces the base stage of high level voltage signal to second switch pipe Q2 and the 3rd switching tube Q3.As charging voltage V C1During less than the voltage of the reverse input end of comparator U2, comparator U2 produces the base stage of low level voltage signal to second switch pipe Q2 and the 3rd switching tube Q3.Hence one can see that, and voltage generation unit 12 is actually an impulse voltage generator.
When comparator U2 produced the high level voltage signal, second switch pipe Q2 ended, the 3rd switching tube Q3 conducting.The input voltage Vi that voltage source 200 provides begins to charge to second capacitor C 2 by diode D1, makes that the voltage at second capacitor C, 2 two ends is Va.
When comparator U2 produces the low level voltage signal, second switch pipe Q2 conducting, the 3rd switching tube Q3 ends.The input voltage Vi that voltage source 200 provides begins to pass to second capacitor C 2 by the collector and emitter of second switch pipe Q2, owing to the electric capacity both end voltage can not be suddenlyd change, so the load voltage Vo=Vi+Va of output 102 generations.With respect to the input voltage Vi that voltage source 200 provides, the magnitude of voltage of the load voltage Vo of voltage lifting circuit 100 outputs of the present invention is improved.
The voltage lifting circuit 100 of present embodiment is owing to adopted the energy-storage units 16 that comprises a capacitor C 2 to replace inductance, thereby integration is better.
Those skilled in the art will be appreciated that; above execution mode only is to be used for illustrating the present invention; and be not to be used as limitation of the invention; as long as within connotation scope of the present invention, appropriate change and the variation that above embodiment did all dropped within the scope of protection of present invention.

Claims (8)

1. voltage lifting circuit, be used for the input voltage that external voltage source provides is promoted, and the generation magnitude of voltage load voltage bigger than input voltage, it is characterized in that: this voltage lifting circuit comprises the voltage generation unit, switch element and energy-storage units, this voltage generation unit is used for producing pulse voltage based on this input voltage, this switch element is connected between this external voltage source and the energy-storage units, the electrical power storage that this switch element is used for when this pulse voltage is in first level this external voltage source being provided is in this energy-storage units, the input voltage that this switch element also is used for when pulse voltage is in second level voltage source being provided is passed to energy-storage units, this energy-storage units is used for this input voltage is offered the output of voltage lifting circuit and discharges the electric energy of its storage simultaneously by this output, to form load voltage at output.
2. voltage lifting circuit as claimed in claim 1 is characterized in that: this first level is a high level, and second level is a low level.
3. voltage lifting circuit as claimed in claim 1, it is characterized in that: this voltage generation unit comprises Schmidt trigger, first resistance, first electric capacity, first switching tube and comparator, this first resistance and first capacitances in series are connected between voltage source and the ground, the input of this Schmidt trigger is connected between first resistance and first electric capacity, the output of this Schmidt trigger links to each other with the grid of first switching tube, the drain electrode of this first switching tube links to each other with the input of Schmidt trigger, source ground, the inverting input of this comparator connects the drain electrode of first switching tube, in-phase input end connects feedback unit, and the output of this comparator connects switch element.
4. voltage lifting circuit as claimed in claim 1, it is characterized in that: this switch element comprises second switch pipe and the 3rd switching tube, the base stage of this second switch pipe links to each other with the base stage and the voltage generation unit of the 3rd switching tube, the emitter of this second switch pipe connects voltage source, the collector electrode of this second switch pipe connects the collector electrode of the 3rd switching tube, the grounded emitter of the 3rd switching tube, the collector electrode of this second switch pipe connects energy-storage units.
5. voltage lifting circuit as claimed in claim 4, it is characterized in that: this energy-storage units comprises the diode and second electric capacity, the anode of this diode connects voltage source, negative electrode connects the output of voltage lifting circuit, one end of this second electric capacity is connected between the collector electrode of the collector electrode of second switch pipe and the 3rd switching tube, and the other end connects the negative electrode of diode.
6. voltage lifting circuit as claimed in claim 1, it is characterized in that: this voltage lifting circuit also comprises feedback unit, this feedback unit is used for this load voltage is taken a sample to produce feedback signal, this voltage generation unit is used for adjusting based on feedback signal the duty ratio of pulse voltage, so that load voltage keeps stable.
7. voltage lifting circuit as claimed in claim 6, it is characterized in that: this feedback unit comprises second resistance and the 3rd resistance, this second resistance and the 3rd resistance are connected in series between this output and the ground, this voltage generation unit comprises a feedback end, and this feedback end is connected between second resistance and the 3rd resistance.
8. voltage lifting circuit as claimed in claim 1 is characterized in that: this voltage lifting circuit also comprises filter unit, and this filter unit is used for this load voltage is carried out Filtering Processing.
CN2010101467840A 2010-04-14 2010-04-14 Voltage boosting circuit Pending CN102223060A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010101467840A CN102223060A (en) 2010-04-14 2010-04-14 Voltage boosting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010101467840A CN102223060A (en) 2010-04-14 2010-04-14 Voltage boosting circuit

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102710123A (en) * 2012-06-07 2012-10-03 无锡市晶源微电子有限公司 High-efficiency low-power consumption pulse energy conversion module
CN106025784A (en) * 2016-06-27 2016-10-12 湖北久之洋红外系统股份有限公司 Boost electrical-light Q-switched circuit
CN109839511A (en) * 2017-11-27 2019-06-04 中国航空工业集团公司西安航空计算技术研究所 A kind of tach signal Acquisition Circuit
CN112242704A (en) * 2019-07-16 2021-01-19 致茂电子(苏州)有限公司 Voltage maintaining circuit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1893245A (en) * 2005-07-05 2007-01-10 恩益禧电子股份有限公司 Power equipment incorporating
CN101262173A (en) * 2007-03-01 2008-09-10 恩益禧电子股份有限公司 Voltage boosting power supply circuit for monitoring charging voltage with predetermined voltage to detect boosted voltage, and boosted voltage control method
CN101340145A (en) * 2007-07-03 2009-01-07 恩益禧电子股份有限公司 Boosting circuit and integrated circuit having the same
CN101345475A (en) * 2007-07-12 2009-01-14 恩益禧电子股份有限公司 Charge pump drive circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1893245A (en) * 2005-07-05 2007-01-10 恩益禧电子股份有限公司 Power equipment incorporating
CN101262173A (en) * 2007-03-01 2008-09-10 恩益禧电子股份有限公司 Voltage boosting power supply circuit for monitoring charging voltage with predetermined voltage to detect boosted voltage, and boosted voltage control method
CN101340145A (en) * 2007-07-03 2009-01-07 恩益禧电子股份有限公司 Boosting circuit and integrated circuit having the same
CN101345475A (en) * 2007-07-12 2009-01-14 恩益禧电子股份有限公司 Charge pump drive circuit

Non-Patent Citations (1)

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Title
来新泉等: "《一种温度不敏感频率范围宽的三角波振荡器》", 《电路与系统学报》, vol. 10, no. 3, 30 June 2005 (2005-06-30), pages 85 - 88 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102710123A (en) * 2012-06-07 2012-10-03 无锡市晶源微电子有限公司 High-efficiency low-power consumption pulse energy conversion module
CN106025784A (en) * 2016-06-27 2016-10-12 湖北久之洋红外系统股份有限公司 Boost electrical-light Q-switched circuit
CN106025784B (en) * 2016-06-27 2021-11-16 湖北久之洋红外系统股份有限公司 Boost electro-optical Q-switching circuit
CN109839511A (en) * 2017-11-27 2019-06-04 中国航空工业集团公司西安航空计算技术研究所 A kind of tach signal Acquisition Circuit
CN112242704A (en) * 2019-07-16 2021-01-19 致茂电子(苏州)有限公司 Voltage maintaining circuit
CN112242704B (en) * 2019-07-16 2023-09-29 致茂电子(苏州)有限公司 Voltage maintaining circuit

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Application publication date: 20111019