[go: up one dir, main page]

TW431068B - Offset adjusting device - Google Patents

Offset adjusting device

Info

Publication number
TW431068B
TW431068B TW083102259A TW83102259A TW431068B TW 431068 B TW431068 B TW 431068B TW 083102259 A TW083102259 A TW 083102259A TW 83102259 A TW83102259 A TW 83102259A TW 431068 B TW431068 B TW 431068B
Authority
TW
Taiwan
Prior art keywords
offset
variable voltage
voltage
generating means
value
Prior art date
Application number
TW083102259A
Other languages
Chinese (zh)
Inventor
Toshihiko Miyauchi
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Application granted granted Critical
Publication of TW431068B publication Critical patent/TW431068B/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45479—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection
    • H03F3/45928—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit
    • H03F3/45968—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit by offset reduction
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/45475—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using IC blocks as the active amplifying circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45479—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection
    • H03F3/45928—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit
    • H03F3/45968—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit by offset reduction
    • H03F3/45973—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit by offset reduction by using a feedback circuit
    • H03F3/45977—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit by offset reduction by using a feedback circuit using switching means, e.g. sample and hold
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/321—Use of a microprocessor in an amplifier circuit or its control circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

There is an offset adjusting device which can execute automatically offset adjustment of an operational amplifier without human intervention. By a CPU 6, an output voltage of a variable voltage generating means 9 for adding a variable voltage to a virtual ground point (a) of a non- inversion amplifier 1 is controlled variably, so that voltage data of the variable voltage generating means 9 is stored in a nonvolatile storage means 10, and also, based on a conversion value of an analog-to-digital converter 5 for executing analog-to-digital conversion of an output of the non-inversion amplifier 1, an offset voltage value of the non-inversion amplifier 1 is detected from variable voltage value data of the variable voltage generating means 9 stored in the nonvolatile storage means 10, and by adding a zero adjustment value of its offset voltage to the virtual ground point (a) of the non-inversion amplifier 1, offset adjustment is executed. Labor for offset adjustment of the operational amplifier becomes unnecessary, and a circuit can be constituted at a low cost.
TW083102259A 1993-07-23 1994-03-16 Offset adjusting device TW431068B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP05182618A JP3098897B2 (en) 1993-07-23 1993-07-23 Offset adjustment device

Publications (1)

Publication Number Publication Date
TW431068B true TW431068B (en) 2001-04-21

Family

ID=16121444

Family Applications (1)

Application Number Title Priority Date Filing Date
TW083102259A TW431068B (en) 1993-07-23 1994-03-16 Offset adjusting device

Country Status (3)

Country Link
JP (1) JP3098897B2 (en)
KR (1) KR0143715B1 (en)
TW (1) TW431068B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI577153B (en) * 2015-10-08 2017-04-01 九暘電子股份有限公司 A Gain Apparatus for Power Sourcing Equipment of Power over Ethernet

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6377110B1 (en) * 1999-09-10 2002-04-23 Keystone Thermometrics Low-cost temperature sensor providing relatively high accuracy, a wide dynamic range and high linearity
EP1111508B1 (en) * 1999-12-23 2003-05-14 EM Microelectronic-Marin SA Integrated circuit with calibration means for calibrating an electronic module, and method for calibrating an electronic module in an integrated circuit
KR100444981B1 (en) 2000-12-15 2004-08-21 삼성전자주식회사 Wearable display system
JP3664990B2 (en) * 2001-04-25 2005-06-29 株式会社東芝 High frequency circuit and communication system
CN1245797C (en) 2002-06-25 2006-03-15 松下电器产业株式会社 Bias control circuit and signal processing device
JP4702921B2 (en) * 2004-01-29 2011-06-15 パナソニック株式会社 Amplifier circuit for optical disk device
JP4716960B2 (en) * 2006-09-15 2011-07-06 エヌ・ティ・ティ・データ先端技術株式会社 Output characteristic adjustment circuit, current measurement circuit, and integrated circuit element
JP2009192460A (en) * 2008-02-18 2009-08-27 Panasonic Corp Angular velocity sensor
JP2011040911A (en) * 2009-08-07 2011-02-24 Renesas Electronics Corp Analog-digital converter circuit, and correction method
WO2011092769A1 (en) * 2010-02-01 2011-08-04 パナソニック株式会社 Operational amplifier circuit, signal drive device, display device and offset voltage adjustment method
KR102014185B1 (en) * 2018-03-27 2019-08-26 엘에스산전 주식회사 Apparatus for determining peak current in inverter
KR102570609B1 (en) * 2020-09-08 2023-08-25 성균관대학교산학협력단 Current sensor capable of automatic adjustment of offset voltage and its automatic offset adjustment method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI577153B (en) * 2015-10-08 2017-04-01 九暘電子股份有限公司 A Gain Apparatus for Power Sourcing Equipment of Power over Ethernet

Also Published As

Publication number Publication date
KR0143715B1 (en) 1998-08-17
JPH0738345A (en) 1995-02-07
JP3098897B2 (en) 2000-10-16
KR950004722A (en) 1995-02-18

Similar Documents

Publication Publication Date Title
TW431068B (en) Offset adjusting device
KR900015528A (en) Imager
JPS5421102A (en) Semiconductor device circuit
GB2006998A (en) Power supply regulation
EP1526638A3 (en) Variable gain amplifier
EP0373227A4 (en) Current control device for pwm control
JPS5490528A (en) Digital-controlling power converter
KR970013650A (en) Integrator enabling output compensation
JPS5546900A (en) Controlling power factor of generator
JPS5566284A (en) Power converter
JPS5422553A (en) Constant voltage circuit
JPS5374239A (en) Power converting device
SU603958A1 (en) Method of stabilization of sine-shaped ac voltage source output voltage
JPS5437448A (en) Overload detecting circuit of power amplifier
SU834612A1 (en) Device for threshold checking of signal top distortion level
JPS5397753A (en) Maximum output controller for power amplifier
SU712958A1 (en) Variable interval converter
BG36342A3 (en) Means for plant growth control
JPS5436542A (en) Power controller for dc transmission system
JPS53131447A (en) Control of power invertor in use for power trfnsmission
JPS5455109A (en) Controller for signal level
JPS5366513A (en) Power system stabilization device
JPS53115051A (en) Voltage control circuit
DE59204943D1 (en) Hearing aid
JPS5595101A (en) Spirit range controller

Legal Events

Date Code Title Description
GD4A Issue of patent certificate for granted invention patent