KR960032131A - Current source automatically adjusted - Google Patents

Current source automatically adjusted Download PDF

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Publication number
KR960032131A
KR960032131A KR1019950003705A KR19950003705A KR960032131A KR 960032131 A KR960032131 A KR 960032131A KR 1019950003705 A KR1019950003705 A KR 1019950003705A KR 19950003705 A KR19950003705 A KR 19950003705A KR 960032131 A KR960032131 A KR 960032131A
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KR
South Korea
Prior art keywords
current
source
current source
output
pmos transistor
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Application number
KR1019950003705A
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Korean (ko)
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KR0121957B1 (en
Inventor
최명준
강근순
Original Assignee
김광호
삼성전자 주식회사
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Priority to KR1019950003705A priority Critical patent/KR0121957B1/en
Publication of KR960032131A publication Critical patent/KR960032131A/en
Application granted granted Critical
Publication of KR0121957B1 publication Critical patent/KR0121957B1/en

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    • 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
    • G05F1/59Regulating 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 including plural semiconductor devices as final control devices for a single load
    • 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
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03MCODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66Digital/analogue converters

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Electrical Variables (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

이 발명은 자동조정되는 전류원(Auto-Calibrating Current Source)에 관한 것으로, 외부 저항소자를 사용하지 않고도 기준 주파수 클릭(Reference Frequency Clock)과 기준 커패시터(Reference Capacitor)를 이용하여 정확한 값의 전류를 얻을수 있는 자동 조정되는 전류원에 관한 것이다.The present invention relates to an auto-calibrating current source, which can obtain a correct current by using a reference frequency clock and a reference capacitor without using an external resistor. A current source that is automatically adjusted.

Description

자동 조정되는 전류원Current source automatically adjusted

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 이 발명의 실시예에 따른 자동 조정되는 전류원을 나타내는 블럭도.3 is a block diagram showing an automatically adjusted current source according to an embodiment of the invention.

제4도는 이 발명의 실시예에 따른 자동 조정되는 전류원에서 전류 센서부를 상세하게 나타낸 회로도.4 is a circuit diagram showing in detail the current sensor unit in the automatically adjusted current source according to an embodiment of the present invention.

내용 없음No content

Claims (4)

일정한 전압을 만들어 주는 기준 전압 발생기와, 상기한 기준 전압 발생기에서 출력한 기준 전압을 입력받아 기준 전류로 변환시키는 전압-전류 변환기와 상기한 전압-전류 변압기에서 출력된 기준 전류를 입력받아 기준으로 하고, 다른 디지털 값 입력을 아날로그 값으로 변환하는 디지털/아날로그 컨버터와 상기한 디지털/아날로그 컨버터의 출력 전류를 입력받아 일정 비율로 출력하는 제1전류원과 상기한 제1전류원에서 출력된 전류를 입력받아 일정한 비율로 출력하는 제2전류원과 상기한 제1전류원에서 출력된 전류를 입력받아 일정한 비율의 안정된 전류를 출력하는 제3전류원과, 기준 전압과 기준 주파수 클럭을 일정 비율로 분주한 주파수클럭을 입력받고 상기한 제2전류원에서 출력된 전류를 센싱하여 디지털 값을 출력하는 전류 센서부와 기준 주파수 클릭과 상기한 전류 센서부에서 출력한 디지털 값을 입력받고, 상기한 전류 센서부로 일정 비율로 분주된 주파수 클릭을 출력하며, 상기한 디지털/아날로그 컨버터를 통해 제1전류원의 출력 전류를 조절하는 디지털 제어부로 이루어지는 것을 특징으로 하는 자동 조정되는 전류원.A reference voltage generator for generating a constant voltage, a voltage-to-current converter that receives the reference voltage output from the reference voltage generator and converts it into a reference current, and receives the reference current output from the voltage-current transformer as a reference The digital / analog converter converts other digital value inputs into analog values and the first current source that receives the output current of the digital / analog converter and outputs it at a predetermined ratio, and receives the current output from the first current source. Receiving a second current source outputting at a rate and a current output from the first current source and outputting a stable current of a constant ratio, and a frequency clock dividing a reference voltage and a reference frequency clock at a predetermined ratio A current sensor unit for sensing a current output from the second current source and outputting a digital value Receiving a frequency click and a digital value output from the current sensor unit, outputting a frequency click divided by a predetermined ratio to the current sensor unit, and adjusting the output current of the first current source through the digital / analog converter. An auto-regulated current source, comprising a digital control unit. 제1항에 있어서, 상기한 전류 센서부는 VDD와 소스가 연결되고, 게이트와 드리엔이 연결되어 있으며, 제2전류원의 출력 전류(I2)를 센싱하는 PMOS 트랜지스터(M6)와 VDO와 소스가 연결되고, 게이트가 상기한 PMOS트랜지스터(M6)의 게이트에 연결되어 있으며, 드레인을 통해서 제2전류원으로부터 입력된 전류를 출력하는 PMOS 트랜지스터(M7)와 상기한 PMOS트랜지스터(M7)의 드레인과 소스가 연결되고, 적절한 바이어싱(Biasing)을 위해서 게이트가 한쪽 단자가 VDD에 연결된 저항(R1)과 한쪽 단자가 접지된 저항(R2)에 연결된 PMOS트랜지스터(M8)와 상기한 PMOS트랜지스터(M8)의 드레인과 소스가 연결되고, 드레인은 접지되어 있으며, 디지털 제어부에서 일정 비율로 분주된 주파수(F2)클릭을 게이트로 입력받은 NMOS 트랜지스터(M9)와 상기한 PMOS 트랜지스터(M8)의 드레인과 상기한 NMOS 트랜지스터(M9)의 소스와 한쪽 단자가 병렬로 연결되어 있고, 다른 한쪽 단자가 접지된 기준 커패시티(CREF)와 기준 전압(CREF)을 (-)측의 입력으로 하고, 상기한 기준 커패시터(CREF)의 한쪽 단자를 (+)측의 입력으로 하여 두 입력된 전압을 비교한 후에, 적절한 디지털 값을 출력하는 비교기(361)의 디지털 제어부에서 일정 비율로 분주된 주파수(F2)클릭을 입력받고, 상기한 비교기(361)의 출력을 래치하여 출력하는 플립-플롭(362)으로 이루어지는 것을 특징으로 하는 자동 조정되는 전류원According to claim 1, wherein the current sensor unit V DD and the source is connected, the gate and driene is connected, the PMOS transistor (M6) and VDO and the source for sensing the output current (I 2 ) of the second current source Is connected to the gate of the PMOS transistor M6 and outputs a current input from the second current source through the drain of the PMOS transistor M7 and the drain and source of the PMOS transistor M7. PMOS transistor M8 and PMOS transistor M8 having a gate connected to a resistor R1 having one terminal connected to V DD and a resistor R2 having one terminal grounded for proper biasing. The drain and the source are connected, and the drain is grounded, and the NMOS transistor M9 and the drain of the PMOS transistor M8 which have received the frequency F2 click divided by the digital controller as a gate are inputted with the gate. The NMOS and the source and one terminal of a transistor (M9) are connected in parallel, and the other one of the terminals is a ground reference capacity (C REF) and a reference voltage (C REF), the (-) and to the input of the side, above After comparing two input voltages with one terminal of the reference capacitor C REF on the (+) side, the frequency F2 divided at a constant ratio by the digital control unit of the comparator 361 outputting an appropriate digital value. An auto-adjusted current source comprising a flip-flop 362 that receives a click and latches and outputs the output of the comparator 361. 제2항에 있어서, 상기한 플립-플롭(362)은 디형 플립-플롭으로 이루어지는 것을 특징으로 하는 자동 조정 전류원3. The self-regulating current source of claim 2 wherein the flip-flop 362 comprises a di-type flip-flop. 제2항에 있어서, 상기한 기준 커패시터(CREF)에 충전이 완료되었을 때의 전압(V2)이 다음의 식으로 이루어지는 것을 특징으로 하는 자동 조정되는 전류원.The current source as set forth in claim 2, wherein the voltage (V 2 ) when the charging of the reference capacitor (C REF ) is completed in the following equation. V2=Q/CREF=I2/(2F2XCREF)V 2 = Q / C REF = I 2 / (2F 2 XC REF ) ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950003705A 1995-02-24 1995-02-24 Auto-calibrating current source KR0121957B1 (en)

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Application Number Priority Date Filing Date Title
KR1019950003705A KR0121957B1 (en) 1995-02-24 1995-02-24 Auto-calibrating current source

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Application Number Priority Date Filing Date Title
KR1019950003705A KR0121957B1 (en) 1995-02-24 1995-02-24 Auto-calibrating current source

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KR960032131A true KR960032131A (en) 1996-09-17
KR0121957B1 KR0121957B1 (en) 1997-12-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110971232A (en) * 2018-09-28 2020-04-07 瑞昱半导体股份有限公司 Digital-to-analog converter device and current control method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104181473A (en) * 2014-08-25 2014-12-03 长沙瑞达星微电子有限公司 Current source calibrating circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110971232A (en) * 2018-09-28 2020-04-07 瑞昱半导体股份有限公司 Digital-to-analog converter device and current control method

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