CN107885268A - Negative feedback current source circuit and electronic equipment - Google Patents

Negative feedback current source circuit and electronic equipment Download PDF

Info

Publication number
CN107885268A
CN107885268A CN201610873627.7A CN201610873627A CN107885268A CN 107885268 A CN107885268 A CN 107885268A CN 201610873627 A CN201610873627 A CN 201610873627A CN 107885268 A CN107885268 A CN 107885268A
Authority
CN
China
Prior art keywords
current source
negative feedback
source circuit
feedback current
resistor
Prior art date
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
CN201610873627.7A
Other languages
Chinese (zh)
Inventor
舒小平
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.)
Leadcore Technology Co Ltd
Datang Semiconductor Design Co Ltd
Original Assignee
Leadcore Technology Co Ltd
Datang Semiconductor Design 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 Leadcore Technology Co Ltd, Datang Semiconductor Design Co Ltd filed Critical Leadcore Technology Co Ltd
Priority to CN201610873627.7A priority Critical patent/CN107885268A/en
Publication of CN107885268A publication Critical patent/CN107885268A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05FSYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10Regulating voltage or current
    • G05F1/46Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/561Voltage to current converters

Abstract

The present invention relates to electronic technology field, discloses a kind of negative feedback current source circuit and electronic equipment.In embodiment of the present invention, first order negative feedback current source circuit, the first constant current for flowing through 3rd resistor is produced, and reference voltage is provided for second level negative feedback current source circuit;Second level negative feedback current source circuit, the reference voltage provided according to first order negative feedback current source circuit, the second constant current for flowing through the second load is produced, wherein, 3rd resistor connection pull-up voltage source, the second carrying ground.Embodiment of the present invention, while realizing the output of the second constant current using first order negative feedback current source circuit, the second carrying ground function is realized, so as to applied to the application scenarios for requiring carrying ground.

Description

Negative feedback current source circuit and electronic equipment
Technical field
The present invention relates to electronic technology field, more particularly to a kind of negative feedback current source circuit and electronic equipment.
Background technology
At present, conventional current source circuit includes the circuit of image current source structure with using operational amplifier negative-feedback electricity Flow the circuit of source structure, the structural representation of the circuit of image current source structure, as shown in figure 1, two bipolar transistor BJT (bipolarjunction transistor) is characteristically just the same, i.e. IB1=IB2、β12=β, ICEO1=ICEO2, its In, IBRepresent base current, β and ICEOIt is the characterisitic parameter of BJT pipes, β is DC current amplification factor, ICEOIt is that base stage is opened Reverse penetration current during road between collector-emitter-base bandgap grading, because two triode Q1 and Q2 have identical base-emitter voltage VBE, Therefore, it was found from circuit first principles analysis, IC1=IC2=IO, wherein, ICRepresent collector current, IOElectric current caused by expression Source, from Kirchhoff's current law (KCL), IRL=IC1+2*IB=IC1* (1+2/ β), then IO=IRL/ (1+2/ β), wherein, IRLTable Show the electric current for flowing through load RL, if β > > 2, and VCC> > VBE, then the value I of current sourceO≈VCC/ RL, wherein, VCCRepresent electricity Source voltage.
Using the structural representation of the circuit of operational amplifier negative feedback current source structure, as shown in Figure 2.Put using computing Big device adds the structure of triode, and the positive input terminal of operational amplifier inputs a reference voltage VREF, and operational amplifier is used and closed Ring negative-feedback, VA=VREF is understood with empty short theory, flows into resistance R2 electric current Io=VA/ R2=VREF/R2, in VCC- Electric current on RL1-Q1-R2-GND branch roads with regard to it is constant be Io, wherein, negative-feedback flow is as follows:If electric current Io becomes big, A points electricity VA rises are pressed, flow through the net voltage of opamp input terminal (i.e.:VREF-VA) reduce, then, operational amplifier output terminal is defeated The voltage gone out can also reduce, and cause triode Q1 base current to reduce, and flow through VCCThe electric current Io of-RL1-Q1-R2-GND branch roads Also can reduce, it is achieved thereby that output current Io is stable.
However, during invention is realized, inventors herein have recognized that, for the circuit of image current source structure, Load RL must be pulled upward to a power supply VCC, current stability, is by power supply VCCInfluence of fluctuations is larger, moreover, this kind of structure is to two The symmetry requirement of individual triode is very high, and actual process is realized complicated.For using operational amplifier negative feedback current source structure Circuit, power supply V must be pulled upward to by loading RL1 one endCC, can not be applied to require the scene for loading RL1 ground connection.
The content of the invention
The purpose of embodiment of the present invention is to provide a kind of negative feedback current source circuit and electronic equipment, utilizes the first order While negative feedback current source circuit realizes the output of the second constant current, the second carrying ground function is realized, so as to be applied to want Seek the application scenarios of carrying ground.
In order to solve the above technical problems, embodiments of the present invention provide a kind of negative feedback current source circuit, including:The One-level negative feedback current source circuit and second level negative feedback current source circuit;
The first order negative feedback current source circuit, the first constant current of 3rd resistor is flowed through for producing, and be institute State second level negative feedback current source circuit and reference voltage is provided;Wherein, the 3rd resistor connection pull-up voltage source;
The second level negative feedback current source circuit, for the base provided according to the first order negative feedback current source circuit Quasi- voltage, produce the second constant current for flowing through the second load;Wherein, second carrying ground.
Embodiments of the present invention additionally provide a kind of electronic equipment, including:Above-mentioned negative feedback current source circuit.
In terms of existing technologies, first order negative feedback current source circuit, generation flows through the 3rd to embodiment of the present invention First constant current of resistance, by caused first constant current, generate the terminal voltage of 3rd resistor, and by the 3rd electricity The terminal voltage of resistance is as reference voltage, there is provided give second level negative-feedback circuit, so as to second level negative feedback current source circuit string Connection, second level negative feedback current source circuit, the reference voltage provided according to first order negative feedback current source circuit, generate and flow through Second constant current of the second load of ground connection so that second level negative feedback current source circuit, it is constant that second can not only be produced Electric current and the second carrying ground function is realized, so that the negative feedback current source circuit, can apply to require that load connects The application scenarios on ground.
In addition, the first order negative feedback current source circuit specifically includes:Triode Q1, the first operational amplifier OP1, One resistance R1, second resistance R2, the loads of 3rd resistor R3 and first RL1;The positive input termination of the first operational amplifier OP1 Reference voltage input VREF, negative input end are grounded after the second resistance R2, the output of the first operational amplifier OP1 End is connected to the base stage of the triode Q1 after the first resistor R1;The colelctor electrode of the triode Q1 is first through described first RL1 is loaded, then after the 3rd resistor R3, connects the pull-up voltage source, emitter stage is grounded after the second resistance R2.
Using the first order negative feedback current source circuit of said structure, the first constant current can not only be produced, and make Obtain first order negative feedback current source circuit in actual applications, also can be the second level negative feedback current when being connected to specific load Source circuit provides constant reference voltage.
In addition, the triode Q1 is NPN type triode.
By NPN type triode Q1, while negative feedback current source circuit function is ensured, select to close according to circuit structure Suitable triode so that the structure of whole circuit is relatively easy.
In addition, the second level negative feedback current source circuit includes:Compound transistor Q2, the second operational amplifier OP2, Four resistance R4, the 5th resistance R5 and the second load RL2;The positive input terminal of the second operational amplifier OP2 is connected to described One-level negative feedback current source circuit, negative input end are connected to the emitter stage of the compound transistor Q2, second operation amplifier Device OP2 output end is connected to the base stage of the compound transistor Q2 through the 4th resistance R4;The compound transistor Q2's Colelctor electrode is grounded after the described second load RL2, and emitter stage is followed by upper pull-up voltage through the 5th resistance R5.
Using above-mentioned second level negative feedback current source circuit, the second constant current can not only be produced, and realizes Two carrying ground functions, so as to applied to more scenes.
Brief description of the drawings
Fig. 1 is a kind of electrical block diagram of image current source structure of the prior art;
Fig. 2 is the electrical block diagram of operational amplifier negative feedback current source structure of the prior art;
Fig. 3 is the structural representation according to a kind of negative feedback current source circuit of first embodiment of the invention;
Fig. 4 is the structural representation according to a kind of negative feedback current source circuit of second embodiment of the invention;
Fig. 5 is the structural representation according to a kind of electronic equipment of third embodiment of the invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, each reality below in conjunction with accompanying drawing to the present invention The mode of applying is explained in detail.However, it will be understood by those skilled in the art that in each embodiment of the present invention, In order that reader more fully understands the application and proposes many ins and outs.But even if without these ins and outs and base Many variations and modification in following embodiment, the application technical scheme claimed can also be realized.
The first embodiment of the present invention is related to a kind of negative feedback current source circuit.Concrete structure schematic diagram, such as Fig. 3 institutes Show.
First order negative feedback current source circuit 10, the first constant current of 3rd resistor is flowed through for producing, and be second Level negative feedback current source circuit provides reference voltage, wherein, 3rd resistor connection pull-up voltage source Vcc.
Specifically, first order negative feedback current source circuit includes:NPN type triode Q1, the first operational amplifier OP1, First resistor R1, second resistance R2 and 3rd resistor R3, wherein, the first operational amplifier OP1 positive input termination reference voltage Input VREF, negative input end are grounded after second resistance R2, and the first operational amplifier OP1 output end is after first resistor R1 Triode Q1 base stage is connected to, triode Q1 colelctor electrode is after 3rd resistor R3, connection pull-up voltage source Vcc, emitter stage It is grounded after second resistance R2, wherein, above-mentioned Q1 can also be N-type metal-oxide semiconductor (MOS) in addition to being NPN type triode NMOS (Negative channel-Metal-Oxide-Semiconductor) transistor.Further, second level negative-feedback Current source circuit, the 3rd resistor R3 of first order negative feedback current source circuit is connected to, between triode Q1 colelctor electrode Node B1.
It should be noted that in above-mentioned first order negative feedback current source circuit, voltage vcc -3rd resistor R3- tri- is pulled up Pole pipe Q1- second resistances R2 electric current, as the first constant current, is denoted as Io1, wherein, Io1=VREF/R2, due to branch road electricity Flow Io1It is constant, therefore the pressure drop flowed through after 3rd resistor R3 is constant, that is to say, that first order negative feedback current source circuit The voltage of first node B1 between 3rd resistor R3, and triode Q1 colelctor electrode is constant.
Second level negative feedback current source circuit 11, for the benchmark electricity provided according to first order negative feedback current source circuit Pressure, the second constant current for flowing through the second load is produced, wherein, the second carrying ground.
Specifically, negative feedback current source circuit in the second level includes:The compound transistor Q2 of two positive-negative-positives, the second computing Amplifier OP2, the 4th resistance R4, the load RL2 of the 5th resistance R5 and second, wherein, the second operational amplifier OP2 positive input terminal The 3rd resistor R3 of first order negative feedback current source circuit is connected to, the first node B1 between triode Q1 colelctor electrode, Negative input end is connected to compound transistor Q2 emitter stage, and the second operational amplifier OP2 output end is through the 4th resistance R4 connections To compound transistor Q2 base stage, compound transistor Q2 colelctor electrode is grounded after the second load RL2, and emitter stage is through the 5th resistance R5 is followed by pulling up voltage source Vcc, wherein, Q2 can also be pliotron in addition to it can be compound transistor, or field is imitated Ying Guan, specifically using which kind of device, according in actual circuit, the output current ability of operational amplifier and the output work of current source Depending on rate is specific, the second load RL2 resistance is can to become with the increase of usage time or the change of other external conditions Change.
It should be noted that the second operational amplifier OP2 of second level negative feedback current source circuit positive input terminal, connection To the first node B1 of first order negative feedback current source circuit, based on amplifier use principle, second level negative feedback current source circuit Node C voltage Vc equal to first node B1 voltage Vb1, then the 5th resistance R5 and 3rd resistor R3 terminal voltage phase Deng, and because pull-up voltage vcc -3rd resistor R3- triode Q1- second resistances R2 electric current it is constant be Io1, then 3rd resistor The pressure drop U=I at R3 both endso1* R3=VREF*R3/R2, therefore, the electric current I of the 5th resistance is flowed througho2=U/R5=(VREF*R3)/ (R2*R5), after the negative-feedback balance of second level negative feedback current source circuit, pull-up voltage source Vcc-the five resistance R5- is compound Triode Q2- second load RL2- GND branch roads electric current with regard to it is constant be Io2, that is, obtain the second constant current Io2, work as Io2Occur During change, second level negative feedback current source circuit can make electric current output stable;Such a circuit structure realizes the second load RL2 mono- End ground connection, without requiring load connection pull-up voltage source Vcc again.
Especially, the circuit structure according to Fig. 3, understood by simple computation, first order negative feedback current source circuit The first constant current Io1, the second constant current I with second level negative feedback current source circuito2, meet certain proportion, be denoted as η, wherein, η=Io2/Io1=R3/R5, that is, the electric current for flowing through the loads of 3rd resistor R3 and second RL2 is a fixed proportion, should Ratio is only relevant with the 5th resistance R5 with 3rd resistor R3, it is achieved thereby that the ratio association of two electric currents.As 3rd resistor R3 For a precision potentiator when, aforementioned proportion η can arbitrarily be set, if necessary to by second load current settings at some In value, reference voltage V REF value can be adjusted using number block converter, realizes any setting of the first constant current, from And realize any setting of the second constant current.
Compared with prior art, in the present embodiment, first order negative feedback current source circuit passes through NPN type triode Q1, the first operational amplifier OP1, first resistor R1, the second resistance R2 of ground connection and connection pull up the 3rd resistor R3 of voltage source Annexation, produce and flow through the first constant current of 3rd resistor, and generate the terminal voltage of 3rd resistor, so as to be second Level negative-feedback circuit provides reference voltage, and second level negative feedback current source circuit is connected with first order negative feedback current source circuit, By compound transistor Q2, the second operational amplifier OP2, the 4th resistance R4, connection pull-up voltage source Vcc the 5th resistance R5 and Second load RL2 of ground connection annexation, not only creates the second constant current for flowing through the second load, it is negative to realize second Grounding function is carried, and causes the first constant current and the second constant current to meet certain proportion, while ratio and the 3rd Resistance is relevant with the 5th resistance, brings flexible and changeable application.
Second embodiment of the present invention is related to a kind of negative feedback current source circuit.Second embodiment is implemented first Further improvement on the basis of mode, is mainly theed improvement is that:In second embodiment of the invention, in first order negative-feedback The first load RL1 is added in current source circuit 10, this causes first order negative feedback current source circuit in actual applications, when even When being connected to the variable specific load of resistance, second level negative feedback current source circuit can be also set to produce constant current, concrete structure shows It is intended to, as shown in Figure 4.
First order negative feedback current source circuit 10, the first constant current of the first load is flowed through for producing, and be second Level negative feedback current source circuit provides reference voltage, wherein, the first load is after 3rd resistor, connection pull-up voltage vcc.
Specifically, first order negative feedback current source circuit includes:NPN type triode Q1, the first operational amplifier OP1, First resistor R1, second resistance R2, the loads of 3rd resistor R3 and first RL1, the first operational amplifier OP1 positive input termination base Quasi- voltage input end VREF, negative input end are grounded after second resistance R2, and the first operational amplifier OP1 output end is through the first electricity Triode Q1 base stage is connected to after resistance R1, triode Q1 colelctor electrode first loads RL1 through first, then after 3rd resistor R3, Pull-up voltage in connection, emitter stage are grounded after second resistance R2, wherein, first load RL1 resistance be can with use when Between increase or other external conditions change and change.Further, second level negative feedback current source circuit, it is connected to Section point B2 between first load RL1, with 3rd resistor R3 of one-level negative feedback current source circuit, so, even if voltage Be superimposed with interference signal on the Vcc of source, first order current source flow through 3rd resistor R3 caused by terminal voltage be also it is forever constant, from And the voltage constant being added on the 5th resistance R5 is ensure that, and then improve the PSRR of whole circuit.
Further, the second operational amplifier OP2 of second level negative feedback current source circuit 11 positive input terminal, connection To the section point B2 of first order negative feedback current source circuit, based on amplifier use principle, second level negative feedback current source circuit Node C voltage Vc equal to section point B2 voltage Vb2, then the 5th resistance R5 and 3rd resistor R3 terminal voltage phase Deng, and because Vcc- 3rd resistors R3- first load RL1- triode Q1- second resistances R2 electric current it is constant be Io1, then the 3rd The pressure drop U=I at resistance R3 both endso1* R3=VREF*R3/R2, therefore, the electric current I of the 5th resistance is flowed througho2=U/R5=(VREF* R3)/(R2*R5), after the negative-feedback balance of second level negative feedback current source circuit, the resistance R5- of voltage source Vcc-the five is pulled up Compound transistor Q2- second load RL2- GND branch roads electric current with regard to it is constant be Io2, that is, obtain the second constant current Io2, work as Io2 When changing, second level negative feedback current source circuit can make electric current output stable, and second load RL2 one end ground connection, Pull-up voltage source Vcc need not be reconnected.
Especially, the circuit structure according to Fig. 4, understood by simple computation, first order negative feedback current source circuit The first constant current Io1, the second constant current I with second level negative feedback current source circuito2, meet certain proportion, be denoted as η, wherein, η=Io2/Io1=R3/R5, that is, the electric current for flowing through 3rd resistor and the second load is a fixed proportion, and the ratio is only It is relevant with the 5th resistance R5 with 3rd resistor R3, it is achieved thereby that the ratio association of two electric currents.When 3rd resistor is an essence During close potentiometer, aforementioned proportion η can arbitrarily be set, can if desired by the current settings of the second load in some value To adjust reference voltage V REF value using number block converter, any setting of the first constant current is realized, so as to realize Any setting of second constant current.
Present embodiment, it is first order negative feedback current source circuit, the load of increase by first RL1 so that first order negative-feedback Current source circuit in actual applications, when being connected in specific load, can also cause second level negative feedback current source circuit to be based on 3rd resistor R3 terminal voltage, the second stable constant current is produced, and second constant current is not because the first load itself is special The change of property and change.
Third embodiment of the invention is related to a kind of electronic equipment, as shown in figure 5, including:Above-mentioned negative feedback current source electricity Road 511.
Negative feedback current source circuit 511, in the case of carrying ground, producing constant current.
Present embodiment, negative feedback current source circuit is applied in actual electronic equipment, realizes negative feedback current The practical application of source circuit.
It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific embodiment of the present invention, And in actual applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.

Claims (9)

  1. A kind of 1. negative feedback current source circuit, it is characterised in that including:First order negative feedback current source circuit is negative anti-with the second level Feed current source circuit;
    The first order negative feedback current source circuit, the first constant current of 3rd resistor is flowed through for producing, and be described the Two level negative feedback current source circuit provides reference voltage;Wherein, the 3rd resistor connection pull-up voltage source;
    The second level negative feedback current source circuit, for the benchmark electricity provided according to the first order negative feedback current source circuit Pressure, produce the second constant current for flowing through the second load;Wherein, second carrying ground.
  2. 2. negative feedback current source circuit according to claim 1, it is characterised in that the first order negative feedback current source electricity Road includes:Triode Q1, the first operational amplifier OP1, first resistor R1, second resistance R2 and 3rd resistor R3;
    The positive input termination reference voltage input VREF of the first operational amplifier OP1, negative input end is through the described second electricity It is grounded after resistance R2, the output end of the first operational amplifier OP1 is connected to the triode Q1 after the first resistor R1 Base stage;The colelctor electrode of the triode Q1 connects the pull-up voltage source after the 3rd resistor R3, described in emitter stage warp It is grounded after second resistance R2.
  3. 3. negative feedback current source circuit according to claim 1, it is characterised in that the first order negative feedback current source electricity Road specifically includes:Triode Q1, the first operational amplifier OP1, first resistor R1, second resistance R2,3rd resistor R3 and first Load RL1;
    The positive input termination reference voltage input VREF of the first operational amplifier OP1, negative input end is through the described second electricity It is grounded after resistance R2, the output end of the first operational amplifier OP1 is connected to the triode Q1 after the first resistor R1 Base stage;The colelctor electrode of the triode Q1 is first through the described first load RL1, then after the 3rd resistor R3, described in connection Voltage source is pulled up, emitter stage is grounded after the second resistance R2.
  4. 4. the negative feedback current source circuit according to Claims 2 or 3, it is characterised in that the triode Q1 is NPN type three Pole pipe.
  5. 5. the negative feedback current source circuit according to Claims 2 or 3, it is characterised in that the second level negative feedback current Source circuit includes:Compound transistor Q2, the second operational amplifier OP2, the 4th resistance R4, the loads of the 5th resistance R5 and second RL2;
    The positive input terminal of the second operational amplifier OP2 is connected to the first order negative feedback current source circuit, negative input end The emitter stage of the compound transistor Q2 is connected to, the output end of the second operational amplifier OP2 is through the 4th resistance R4 It is connected to the base stage of the compound transistor Q2;The colelctor electrode of the compound transistor Q2 is grounded after the described second load RL2, Emitter stage is followed by pulling up voltage source through the 5th resistance R5.
  6. 6. negative feedback current source circuit according to claim 5, it is characterised in that the second operational amplifier OP2's Positive input terminal, it is connected to the first node B1 of the first order negative feedback current source circuit, or section point B2;
    Wherein, nodes of the first node B1 between the 3rd resistor R3, and the colelctor electrode of the triode Q1;It is described Nodes of the section point B2 between the first load resistance RL1, with the 3rd resistor R3.
  7. 7. negative feedback current source circuit according to claim 5, it is characterised in that the compound transistor Q2 is to include two The compound transistor of individual PNP type triode.
  8. 8. negative feedback current source circuit according to claim 6, it is characterised in that second constant current and described the The ratio of one constant current, equal to the described first load RL1 and the 5th resistance R5 ratio, or equal to the described 3rd electricity Hinder R3 and the 5th resistance R5 ratio.
  9. 9. a kind of electronic equipment, it is characterised in that including the negative feedback current source circuit described in any one of claim 1 to 8.
CN201610873627.7A 2016-09-29 2016-09-29 Negative feedback current source circuit and electronic equipment Pending CN107885268A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610873627.7A CN107885268A (en) 2016-09-29 2016-09-29 Negative feedback current source circuit and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610873627.7A CN107885268A (en) 2016-09-29 2016-09-29 Negative feedback current source circuit and electronic equipment

Publications (1)

Publication Number Publication Date
CN107885268A true CN107885268A (en) 2018-04-06

Family

ID=61769989

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610873627.7A Pending CN107885268A (en) 2016-09-29 2016-09-29 Negative feedback current source circuit and electronic equipment

Country Status (1)

Country Link
CN (1) CN107885268A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109445501A (en) * 2018-12-21 2019-03-08 杭州承诺医疗科技有限公司 A kind of high-precision high voltage current source circuit
CN109782835A (en) * 2018-12-27 2019-05-21 湖南银河电气有限公司 A kind of wide-range and the DC current source and processing method of closed-loop control
CN109976429A (en) * 2019-04-19 2019-07-05 宁波大学 Regulated power supply in a kind of current feedback zero-temperature coefficient piece
CN110262617A (en) * 2019-07-22 2019-09-20 宁波市芯能微电子科技有限公司 LD0 pre-compensation circuit
CN113219316A (en) * 2021-05-18 2021-08-06 北京轩宇空间科技有限公司 Triode amplification factor test circuit based on negative feedback
CN113282130A (en) * 2021-06-08 2021-08-20 西安中颖电子有限公司 High-precision LED constant current driving circuit
WO2022245233A1 (en) * 2021-05-17 2022-11-24 Закрытое Акционерное Общество "Драйв" Controller for an electronically controlled resistor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002351557A (en) * 2001-05-25 2002-12-06 Yokogawa Electric Corp Current generator
CN103631297A (en) * 2012-08-28 2014-03-12 三星半导体(中国)研究开发有限公司 Low voltage output band-gap reference circuit
CN203552115U (en) * 2013-10-30 2014-04-16 中国航空工业集团公司第六三一研究所 Output circuit of program-control current source
CN204117010U (en) * 2014-07-18 2015-01-21 苏州华兴源创电子科技有限公司 Switching mode mu balanced circuit, constant pressure and flow produce circuit and constant voltage constant current power equipment
CN105138063A (en) * 2015-07-28 2015-12-09 中国科学院电子学研究所 Band-gap reference circuit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002351557A (en) * 2001-05-25 2002-12-06 Yokogawa Electric Corp Current generator
CN103631297A (en) * 2012-08-28 2014-03-12 三星半导体(中国)研究开发有限公司 Low voltage output band-gap reference circuit
CN203552115U (en) * 2013-10-30 2014-04-16 中国航空工业集团公司第六三一研究所 Output circuit of program-control current source
CN204117010U (en) * 2014-07-18 2015-01-21 苏州华兴源创电子科技有限公司 Switching mode mu balanced circuit, constant pressure and flow produce circuit and constant voltage constant current power equipment
CN105138063A (en) * 2015-07-28 2015-12-09 中国科学院电子学研究所 Band-gap reference circuit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
本书编写组: "《电子元器件应用进阶》", 30 September 2005, 福建科学技术出版社 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109445501A (en) * 2018-12-21 2019-03-08 杭州承诺医疗科技有限公司 A kind of high-precision high voltage current source circuit
CN109782835A (en) * 2018-12-27 2019-05-21 湖南银河电气有限公司 A kind of wide-range and the DC current source and processing method of closed-loop control
CN109976429A (en) * 2019-04-19 2019-07-05 宁波大学 Regulated power supply in a kind of current feedback zero-temperature coefficient piece
CN109976429B (en) * 2019-04-19 2020-09-08 宁波大学 Current feedback type zero-temperature-coefficient on-chip voltage-stabilized power supply
CN110262617A (en) * 2019-07-22 2019-09-20 宁波市芯能微电子科技有限公司 LD0 pre-compensation circuit
CN110262617B (en) * 2019-07-22 2020-10-27 宁波市芯能微电子科技有限公司 LDO (low dropout regulator) pre-compensation circuit
WO2022245233A1 (en) * 2021-05-17 2022-11-24 Закрытое Акционерное Общество "Драйв" Controller for an electronically controlled resistor
CN113219316A (en) * 2021-05-18 2021-08-06 北京轩宇空间科技有限公司 Triode amplification factor test circuit based on negative feedback
CN113219316B (en) * 2021-05-18 2022-10-14 北京轩宇空间科技有限公司 Triode amplification factor test circuit based on negative feedback
CN113282130A (en) * 2021-06-08 2021-08-20 西安中颖电子有限公司 High-precision LED constant current driving circuit

Similar Documents

Publication Publication Date Title
CN107885268A (en) Negative feedback current source circuit and electronic equipment
CN106406412B (en) A kind of high-order temperature compensated band-gap reference circuit
CN109921639A (en) A kind of Buck converter based on the control of variable turn-on time
US11137788B2 (en) Sub-bandgap compensated reference voltage generation circuit
CN207488871U (en) A kind of CMOS low pressure difference linear voltage regulators using novel buffer
CN104699161A (en) Voltage stabilizer capable of dynamically adjusting bias current according to load frequency and output voltage
CN107315439A (en) High-precision voltage controlled current source circuit
CN104777869A (en) Quickly responded low dropout regulator capable of dynamically adjusting reference voltage
CN106020317B (en) A kind of current foldback circuit of low pressure difference linear voltage regulator
CN107102680A (en) A kind of low noise low pressure difference linear voltage regulator
CN209433274U (en) A kind of constant current generative circuit structure of automatic biasing
CN106940580B (en) A kind of low-power consumption band gap reference and supply unit
CN202587508U (en) Accurate dimming circuit having low quiescent current
CN107515639B (en) A kind of circuit for generating source voltage of Low Drift Temperature
CN106843360B (en) A kind of reference voltage circuit and programmable power supply
CN102931833A (en) Circuit for converting high voltage into low voltage in analogue circuit
CN109917843A (en) A kind of the constant current generative circuit structure and constant current generation method of automatic biasing
CN213399341U (en) Bandgap reference circuit and integrated circuit
CN203326882U (en) Simulation multiplier in switch voltage-stabilizer feedback loop
CN203673379U (en) Band gap reference voltage generating circuit
CN208299692U (en) A kind of secondary slope compensation circuit suitable for current-mode BUCK converter
CN207992862U (en) A kind of push-pull type quick response LDO circuit
CN111399580A (en) Linear voltage stabilizing circuit
CN207301846U (en) A kind of more loop substrate dynamic bias LDO circuits of numerical model analysis
CN102968150A (en) Output impedance compensation circuit

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20180406

Assignee: Shanghai Li Ke Semiconductor Technology Co., Ltd.

Assignor: Leadcore Technology Co., Ltd.

Contract record no.: 2018990000159

Denomination of invention: Negative feedback current source circuit and electronic equipment

License type: Common License

Record date: 20180615

EE01 Entry into force of recordation of patent licensing contract
RJ01 Rejection of invention patent application after publication

Application publication date: 20180406

RJ01 Rejection of invention patent application after publication