CN107589775A - A kind of reference voltage source of positive temperature coefficient current compensation - Google Patents
A kind of reference voltage source of positive temperature coefficient current compensation Download PDFInfo
- Publication number
- CN107589775A CN107589775A CN201711000493.9A CN201711000493A CN107589775A CN 107589775 A CN107589775 A CN 107589775A CN 201711000493 A CN201711000493 A CN 201711000493A CN 107589775 A CN107589775 A CN 107589775A
- Authority
- CN
- China
- Prior art keywords
- resistance
- npn
- pipe
- pipes
- temperature coefficient
- 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.)
- Granted
Links
- 230000005611 electricity Effects 0.000 claims description 7
- 238000010276 construction Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 238000007726 management method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012358 sourcing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Control Of Electrical Variables (AREA)
Abstract
The invention discloses a kind of reference voltage source of positive temperature coefficient current compensation, positive temperature coefficient current compensation circuit is additionally arranged in the output end of reference voltage source, two groups of different positive temperature coefficient electric currents of temperature coefficient are produced using two NPN pipes Q8 and Q9 and corresponding resistance R7 and R8, two groups of electric currents are superimposed, optimize the rate of temperature change of electric current.The present invention solves the application limitation of traditional bandgap benchmark, the limitation of negative temperature coefficient can only be produced by changing conventional first order band-gap reference high temperature section, and a kind of output voltage compensation scheme simple in construction, cost is cheap, reliable and stable is provided for high-current power switch power supply by positive temperature coefficient of the benchmark in total temperature scope.
Description
Technical field
The present invention relates to a kind of positive temperature coefficient current compensation of reference voltage source, more particularly, to power management chip
Reference voltage source, belong to ic power design field.
Background technology
Voltage reference is the pith in analog circuit, especially needs output voltage to keep stable power management core
Piece is, it is necessary to which high accuracy, the good voltage reference of temperature coefficient carry out regulated output voltage.(bipolar process is for traditional bipolar process
Main active device is the integrated circuit technology of bipolar transistor, and bipolar transistor is usually said triode) band gap
What benchmark utilized is to be operated in the bipolar transistor in the case of different current densities, and its voltage difference has positive temperature coefficient,
And the emitter stage conducting voltage of bipolar transistor has negative temperature coefficient, the two superposition is produced into the relatively low base of temperature coefficient
It is accurate.This benchmark is normally present on low temperature and hot stage voltage is slightly lower, the slightly higher characteristic of temperature in medium temperature section.General
This benchmark can meet to require in logical application, but in some have the application of specific demand, common voltage reference performance is not
It is sufficient for demand.In order to compensate power management chip in heavy duty due under output voltage caused by line loss and adjustment of load
Drop is, it is necessary to which additionally increase complicated circuit compensates.
The content of the invention
, can be in total temperature it is an object of the present invention to provide a kind of reference voltage source of positive temperature coefficient current compensation
In the range of realize positive temperature coefficient, can meet that reference voltage is stablized accurate under light condition, with temperature under case of heavy load
Degree rise reference voltage increases, and is declined with the output voltage for compensating for adjustment of load and line loss is brought, realizes full load condition
Lower output voltage stabilization, save the compensation circuit of complexity.
To achieve the above object, technical scheme is as follows：A kind of reference voltage of positive temperature coefficient current compensation
Source, it is characterised in that：Positive temperature coefficient current compensation circuit is set up in the output end of reference voltage source, the positive temperature coefficient electric current
Compensation circuit includes NPN pipe Q8, NPN pipes Q9, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8 and resistance R9；NPN is managed
Q8 colelctor electrode interconnects with NPN pipes Q9 colelctor electrode, NPN pipes Q8 emitter stage connection resistance R7 one end, NPN pipes Q9 transmitting
Pole connection resistance R8 one end, the resistance R7 other end interconnect with the resistance R8 other end and are connected resistance R9 one end, resistance
The R9 other end and resistance R6 one end interconnect and are grounded, resistance R6 other end connection NPN pipes Q9 base stage and resistance R5's
One end, resistance R5 other end connection NPN pipes Q8 base stage and resistance R4 one end, resistance R4 other end connection reference voltage
One output end Vref, NPN pipe Q8 in source colelctor electrode is connected the another of reference voltage source with NPN pipes Q9 colelctor electrode interconnection end
Individual output end.
The reference voltage source includes PNP pipe Q1, PNP pipe Q2, NPN pipe Q3, NPN pipe Q4, NPN pipe Q5, NPN pipe Q6, NPN
Pipe Q7 and resistance R1, resistance R2 and resistance R3, wherein the identical NPN pipes of NPN pipes Q4 at least two are in parallel to be formed；PNP pipe
Q1 emitter stage and PNP pipe Q2 emitter stage interconnect and connect NPN pipes Q6 base stage, PNP pipe Q1 ground level and PNP pipe Q2 base
Level interconnects and connects the colelctor electrode and NPN pipe Q4 colelctor electrodes of PNP pipe Q2 pipes, PNP pipe Q1 colelctor electrode connection NPN pipes Q3 current collection
Pole, NPN pipes Q3 emitter stage interconnect with NPN pipes Q4 emitter stage and are connected NPN pipes Q5 colelctor electrode, and NPN pipes Q5 base stage connects
Bias voltage, NPN pipes Q5 emitter stage connection resistance R3 one end and ground connection are connect, resistance R3 other end connection NPN pipes Q7's
Emitter stage, NPN pipes Q7 base stage and colelctor electrode interconnect and connect NPN pipes Q4 base stage and resistance R2 one end, and resistance R2's is another
Another output end and positive temperature coefficient electricity of one end connection NPN pipes Q3 base stage and resistance R1 one end as reference voltage source
NPN pipes Q8 colelctor electrode is connected with NPN pipes Q9 colelctor electrode interconnection end in stream compensation circuit, resistance R1 other end connection NPN
The other end of the pipe Q6 emitter stage as the output Vref and resistance R4 in positive temperature coefficient current compensation circuit of reference voltage source
Connection, NPN pipes Q6 colelctor electrode connection power vd D.
In the reference voltage source, PNP pipe Q1 and PNP pipe Q2 form active load current mirror, NPN pipe Q3 and NPN pipes Q4
For differential pair tube, NPN pipes Q5 is tail current pipe, and NPN pipes Q6 is driving adjustment pipe.
The NPN pipes Q4, which is that 2-8 identical NPN pipe is in parallel, to be formed.
Advantages of the present invention and remarkable result：The present invention proposes a kind of novel bipolar process second order compensation mode,
On the basis of traditional bipolar process single order band-gap reference, partial pressure is carried out, obtains two different ground levels using resistance R4, R5, R6
Voltage, it is applied to two NPN pipes Q8 and Q9 ground level respectively, Q8 and Q9 are in different base voltages and different emitter stages
In the presence of series resistance R7 and R8, the different positive temperature coefficient electric current of two groups of temperatures coefficient is produced, after two groups of electric currents are superimposed
Act on R1, form second-order temperature compensation circuit.Traditional bipolar process single order band-gap reference high temperature section can only produce negative
Temperature coefficient, ordinary second order band-gap reference generally produce zero-temperature coefficient benchmark.The present invention solves traditional bipolar process band gap
The application limitation of benchmark, the office of negative temperature coefficient can only be produced by changing traditional bipolar process single order band-gap reference high temperature section
It is sex-limited.Provided by benchmark for high-current power switch power supply in the positive temperature coefficient of total temperature scope it is a kind of simple in construction,
Cost is cheap, reliable and stable output voltage compensation scheme.
Brief description of the drawings
Fig. 1 is bipolar process positive temperature coefficient reference voltage source circuit figure of the present invention；
Fig. 2 is PART1 parts single order band-gap reference individually caused reference voltage temperature curve；
Fig. 3 is on PART1 single order band-gap references, and after the positive temperature coefficient electric current of superposition PART2 parts, caused second order is mended
Repay bandgap voltage reference temperature curve.
Embodiment
Such as Fig. 1, output end of the present invention in a kind of reference voltage source PART1 parts of prior art is additionally arranged positive temperature system
Number current compensation circuit.Reference voltage source PART1 parts include current mirror PNP pipe Q1 and Q2, and difference NPN is to pipe Q3 and Q4, together
When also serve as producing positive temperature coefficient voltage △ VBE(△VBE=VBEQ3-VBEQ4, i.e. NPN pipes Q3 emitter stage conducting voltage and NPN
The difference of pipe Q4 emitter stage conducting voltage) to pipe, tail current NPN pipe Q5, output adjustment pipe Q6 (Q6 base voltages are VDD2,
It is converted to by VDD by internal circuit, VDD2 ＜ VDD), series resistance R1, while also serve as PART2 positive temperature coefficient electric currents
It is superimposed resistance, △ VBEAct on resistance R2, there is provided benchmark negative temperature coefficient NPN pipe Q7, benchmark series resistance R3.Wherein Q1 and Q2 is used
To balance Q3 and Q4 electric current, force the two electric current equal.Q3 is that 1 NPN is managed, Q4 be n NPN pipe it is in parallel (n no less than 2,
Usually 8 or so), therefore Q4 pipes quantity is n times of Q3 pipes, then the current density of Q4 pipes is the 1/n of Q3 pipes, can be obtained by formula
The difference of Q3 and Q4 base voltages, i.e. △ VBE=VTLnn, wherein VTFor thermal voltage, n is multiple of the Q4 pipes to Q3 pipes.Resistance R2's
Voltage is △ VBE, in the case where not considering that PART2 parts positive temperature coefficient electric current influences, reference voltage
VBEQ7It is the emitter stage conducting voltage of Q7 pipes, temperature curve waveform is as shown in Figure 2.
PART2 parts is produce the circuit of positive temperature coefficient electric current, in high temperature section by from resistance R1 sourcing currents, improving
The voltage difference at resistance R1 both ends, and then cause reference voltage V ref that positive temperature coefficient is presented in total temperature scope.Wherein resistance R4,
R5 and R6 carries out electric resistance partial pressure to reference voltage V ref.Its operation principle is that Vref is the relatively low benchmark of temperature coefficient, then phase
With the resistance of production technology type, (the identical temperature coefficient that ensure that these resistance of technology type, voltage coefficient are identical, resistance
Matching is good) R4, R5 and R6 carry out the base voltage V of obtained Q8 and Q9 after partial pressure to VrefBQ8And VBQ9, equally also it is temperature
The less voltage of coefficient.Because NPN pipe emitter stages conducting voltage has -2mV/ DEG C or so of temperature coefficient, led in cold stage
The pressure that is powered is high, and its conducting voltage of hot stage can reduce.In the range of chip operating temperature, with the rise PART1 portions of temperature
Reference voltage V ref caused by point is in from positive temperature coefficient to zero-temperature coefficient gradual change state.If there is no current compensation portion
Point, Vref will enter negative temperature coefficient state in high temperature section.As temperature rise enters high temperature section, current compensation, which plays, to be made
With NPN pipes Q8 and Q9 conducting voltage constantly decline, NPN pipes Q8 and Q9 electric conduction after priority reaches the temperature spot set
Pressure falls below VBQ8And VBQ9So that Q8 and Q9 is successively turned on, and is continued with the rise NPN pipe emitter stages conducting voltage of temperature
Decline, NPN pipes conducting degree continues to improve, and Q8 and Q9 start to produce collector current and gradually increased, Q8 and Q9 colelctor electrode
Electric current superposition improves R1 pressure drop to resistance R1, most at last reference voltage V ref high temperature interval curve by negative temperature
Coefficient is modified to positive temperature coefficient.Reference temperature curve is as shown in Figure 3.
NPN pipes Q8 and Q9 base voltage VBQ8And VBQ9It is as follows with reference voltage V ref and R4, R5, R6 relation：
According to uppermost resistive voltage division formulas, suitable resistance value is chosen to resistance R4, R5 and R6, it is necessary to meet through formula meter
Obtained R4, R5 and R6 electric resistance partial pressure VBQ8And VBQ9It is less than emitter junction conducting voltage V in normal temperatureBESo that NPN pipes Q8 and
Q9 is in cut-off state in low temperature and normal temperature stage, while meets to be higher than emitter stage conducting voltage in hot stage again so that
NPN pipes Q8 and Q9 is in the conduction state in high temperature, and temperature coefficient amendment is carried out to reference voltage.According to practical application temperature curve
Demand, it is relatively low if necessary to temperature curve rising inflection temperature, then need to reduce R5 and R6 resistance values, reduce VQ8And VQ9, it is on the contrary
Then increase R5 and R6.The resistance R7, R8 and R9 of NPN pipe Q8 and Q9 emitter stage series connection can be with careful optimization temperature curves so that base
Quasi- voltage Vref temperature curve adjustability is more preferable, corresponding resistance R7 emphasis adjustment high temperature stage waveform, and resistance R8 adjustment is high
Thermophase waveform.When need curve hot stage upwarp amplitude it is bigger when, then need to reduce corresponding resistance value, it is on the contrary then need
Increase resistance.Resistance R9 receives resistance R7 and resistance R8 merging electric current, R9 values and R7 and R8 be mutually correspond to it is shifting
Relation, increase R9 can correspond to reduce R7 and R8 resistances, save chip area reduce cost.Reference voltage after optimization
Temperature characteristics shape is more nearly expected design, the positive temperature coefficient of benchmark can preferably to heavy duty when system output
Voltage compensates.
Claims (4)
- A kind of 1. reference voltage source of positive temperature coefficient current compensation, it is characterised in that：Set up in the output end of reference voltage source Positive temperature coefficient current compensation circuit, the positive temperature coefficient current compensation circuit include NPN pipe Q8, NPN pipes Q9, resistance R4, electricity Hinder R5, resistance R6, resistance R7, resistance R8 and resistance R9；NPN pipes Q8 colelctor electrode interconnects with NPN pipes Q9 colelctor electrode, NPN pipes Q8 emitter stage connection resistance R7 one end, NPN pipes Q9 emitter stage connection resistance R8 one end, resistance the R7 other end and electricity The resistance R8 other end interconnects and connects resistance R9 one end, and the resistance R9 other end and resistance R6 one end interconnect and be grounded, electricity Hinder R6 other end connection NPN pipes Q9 base stage and resistance R5 one end, resistance R5 other end connection NPN pipes Q8 base stage and Resistance R4 one end, resistance R4 the other end connection reference voltage source output end Vref, a NPN pipe Q8 colelctor electrode with Another output end of NPN pipes Q9 colelctor electrode interconnection end connection reference voltage source.
- 2. the reference voltage source of positive temperature coefficient current compensation according to claim 1, it is characterised in that：The benchmark electricity Potential source includes PNP pipe Q1, PNP pipe Q2, NPN pipe Q3, NPN pipe Q4, NPN pipe Q5, NPN pipe Q6, NPN pipe Q7 and resistance R1, electricity R2 and resistance R3 is hindered, wherein the identical NPN pipes of NPN pipes Q4 at least two are in parallel is formed；PNP pipe Q1 emitter stage and PNP pipe Q2 emitter stage interconnects and connects NPN pipes Q6 base stage, and PNP pipe Q1 ground level interconnects with PNP pipe Q2 ground level and is connected PNP pipe The colelctor electrode and NPN pipe Q4 colelctor electrodes of Q2 pipes, PNP pipe Q1 colelctor electrode connection NPN pipes Q3 colelctor electrode, NPN pipes Q3 transmitting Pole interconnects with NPN pipes Q4 emitter stage and is connected NPN pipes Q5 colelctor electrode, NPN pipes Q5 base stage connection bias voltage, NPN pipes Q5 emitter stage connection resistance R3 one end and ground connection, resistance R3 other end connection NPN pipes Q7 emitter stage, NPN pipes Q7's Base stage and colelctor electrode interconnect and connect NPN pipes Q4 base stage and resistance R2 one end, resistance R2 other end connection NPN pipes Q3's Managed as another output end of reference voltage source with NPN in positive temperature coefficient current compensation circuit base stage and resistance R1 one end Q8 colelctor electrode is connected with NPN pipes Q9 colelctor electrode interconnection end, and resistance R1 other end connection NPN pipes Q6 emitter stage is as base The output Vref of reference voltage source is connected with the other end of resistance R4 in positive temperature coefficient current compensation circuit, NPN pipes Q6 current collection Pole connection power vd D.
- 3. the reference voltage source of positive temperature coefficient current compensation according to claim 2, it is characterised in that：The benchmark electricity In potential source, PNP pipe Q1 and PNP pipe Q2 form active load current mirror, and NPN pipe Q3 and NPN pipes Q4 is differential pair tube, NPN pipes Q5 For tail current pipe, NPN pipes Q6 is driving adjustment pipe.
- 4. the reference voltage source of the positive temperature coefficient current compensation according to Claims 2 or 3, it is characterised in that：The NPN Pipe Q4, which is that 2-8 identical NPN pipe is in parallel, to be formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711000493.9A CN107589775B (en) | 2017-10-24 | 2017-10-24 | A kind of reference voltage source of positive temperature coefficient current compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711000493.9A CN107589775B (en) | 2017-10-24 | 2017-10-24 | A kind of reference voltage source of positive temperature coefficient current compensation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107589775A true CN107589775A (en) | 2018-01-16 |
| CN107589775B CN107589775B (en) | 2018-11-23 |
Family
ID=61043434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711000493.9A Active CN107589775B (en) | 2017-10-24 | 2017-10-24 | A kind of reference voltage source of positive temperature coefficient current compensation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107589775B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111596717A (en) * | 2020-06-03 | 2020-08-28 | 南京微盟电子有限公司 | Second-order compensation reference voltage source |
| CN112130615A (en) * | 2020-11-25 | 2020-12-25 | 上海芯龙半导体技术股份有限公司 | Reference source circuit and chip |
| CN114815950A (en) * | 2022-05-27 | 2022-07-29 | 浙江地芯引力科技有限公司 | Current generation circuit, chip and electronic equipment |
| TWI832306B (en) * | 2021-09-14 | 2024-02-11 | 華邦電子股份有限公司 | Temperature compensation circuit and semiconductor integrated circuit using the same |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100200500B1 (en) * | 1996-12-27 | 1999-06-15 | 김광호 | Reference current generating circuit |
| US20100007322A1 (en) * | 2008-07-10 | 2010-01-14 | Mobien Corporation | Resistor unit and a circuit including the resistor unit |
| US20100060345A1 (en) * | 2008-09-08 | 2010-03-11 | Faraday Technology Corporation | Reference circuit for providing precision voltage and precision current |
| CN204256580U (en) * | 2014-12-11 | 2015-04-08 | 无锡新硅微电子有限公司 | A kind of band-gap reference circuit of bilateral temperature compensation |
| CN105183066A (en) * | 2015-09-08 | 2015-12-23 | 电子科技大学 | Band-gap reference circuit for infrared focal plane array |
| CN106647916A (en) * | 2017-02-28 | 2017-05-10 | 中国电子科技集团公司第五十八研究所 | High-order temperature compensation band-gap reference voltage source |
| CN206479869U (en) * | 2017-02-28 | 2017-09-08 | 建荣集成电路科技(珠海)有限公司 | Low voltage bandgap reference, chip, portable power source and drive recorder |
-
2017
- 2017-10-24 CN CN201711000493.9A patent/CN107589775B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100200500B1 (en) * | 1996-12-27 | 1999-06-15 | 김광호 | Reference current generating circuit |
| US20100007322A1 (en) * | 2008-07-10 | 2010-01-14 | Mobien Corporation | Resistor unit and a circuit including the resistor unit |
| US20100060345A1 (en) * | 2008-09-08 | 2010-03-11 | Faraday Technology Corporation | Reference circuit for providing precision voltage and precision current |
| CN204256580U (en) * | 2014-12-11 | 2015-04-08 | 无锡新硅微电子有限公司 | A kind of band-gap reference circuit of bilateral temperature compensation |
| CN105183066A (en) * | 2015-09-08 | 2015-12-23 | 电子科技大学 | Band-gap reference circuit for infrared focal plane array |
| CN106647916A (en) * | 2017-02-28 | 2017-05-10 | 中国电子科技集团公司第五十八研究所 | High-order temperature compensation band-gap reference voltage source |
| CN206479869U (en) * | 2017-02-28 | 2017-09-08 | 建荣集成电路科技(珠海)有限公司 | Low voltage bandgap reference, chip, portable power source and drive recorder |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111596717A (en) * | 2020-06-03 | 2020-08-28 | 南京微盟电子有限公司 | Second-order compensation reference voltage source |
| CN111596717B (en) * | 2020-06-03 | 2021-11-02 | 南京微盟电子有限公司 | Second-order compensation reference voltage source |
| CN112130615A (en) * | 2020-11-25 | 2020-12-25 | 上海芯龙半导体技术股份有限公司 | Reference source circuit and chip |
| TWI832306B (en) * | 2021-09-14 | 2024-02-11 | 華邦電子股份有限公司 | Temperature compensation circuit and semiconductor integrated circuit using the same |
| CN114815950A (en) * | 2022-05-27 | 2022-07-29 | 浙江地芯引力科技有限公司 | Current generation circuit, chip and electronic equipment |
| CN114815950B (en) * | 2022-05-27 | 2024-03-12 | 浙江地芯引力科技有限公司 | Current generating circuit, chip and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107589775B (en) | 2018-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107589775B (en) | A kind of reference voltage source of positive temperature coefficient current compensation | |
| CN101840240B (en) | Adjustable multi-value output reference voltage source | |
| CN102270008B (en) | Band-gap reference voltage source with wide input belt point curvature compensation | |
| CN103440015B (en) | Band-gap reference circuit | |
| JPS62104314A (en) | Level converting circuit | |
| CN112327986B (en) | Band-gap reference voltage source based on clamping | |
| CN109066290A (en) | Low-voltage space precision current mirror image circuit applied to laser driver | |
| CN109672414A (en) | A kind of bias circuit construction with temperature-compensating | |
| CN203386100U (en) | Band gap reference circuit | |
| CN108427468A (en) | A kind of Low Drift Temperature fast transient response high PSRR bandgap voltage reference | |
| CN109474263A (en) | A kind of electrification reset circuit | |
| CN102931833B (en) | Circuit for converting high voltage into low voltage in analogue circuit | |
| CN103631310B (en) | Bandgap voltage reference | |
| CN109828630A (en) | A kind of temperature independent low-power consumption reference current source | |
| CN109672428A (en) | A kind of relaxor | |
| CN106940580A (en) | A kind of low-power consumption band gap reference and supply unit | |
| CN101825910B (en) | Current source device capable of regulating current intensity | |
| CN107515639B (en) | A kind of circuit for generating source voltage of Low Drift Temperature | |
| CN105607685B (en) | A kind of dynamic bias voltage a reference source | |
| CN201681321U (en) | Current source device capable of adjusting current intensity | |
| CN101739055A (en) | Generator for generating reference voltage and reference current and generating method | |
| CN111596717B (en) | Second-order compensation reference voltage source | |
| CN209821691U (en) | Direct current power supply circuit | |
| JP2734426B2 (en) | Level conversion circuit | |
| CN102279616B (en) | High-precision current reference source with pure MOS structure and method of manufacturing high-precision current reference source |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 210042 4th floor, building 1, Xuzhuang Software Park, 699-8 Xuanwu Avenue, Xuanwu District, Nanjing City, Jiangsu Province Patentee after: NANJING MICRO ONE ELECTRONICS Inc. Country or region after: China Address before: Xuzhuang Software Park, No. 699-8 Xuanwu Avenue, Xuanwu District, Nanjing City, Jiangsu Province, 210042 Patentee before: NANJING MICRO ONE ELECTRONICS Inc. Country or region before: China |