JPS551761A - Bias current compensation circuit for operational amplifier - Google Patents

Bias current compensation circuit for operational amplifier

Info

Publication number
JPS551761A
JPS551761A JP7471478A JP7471478A JPS551761A JP S551761 A JPS551761 A JP S551761A JP 7471478 A JP7471478 A JP 7471478A JP 7471478 A JP7471478 A JP 7471478A JP S551761 A JPS551761 A JP S551761A
Authority
JP
Japan
Prior art keywords
amplifier
output
resistor
bias current
operational amplifier
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
JP7471478A
Other languages
Japanese (ja)
Inventor
Masuo Hanawaka
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works 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 Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Hokushin Electric Corp
Priority to JP7471478A priority Critical patent/JPS551761A/en
Publication of JPS551761A publication Critical patent/JPS551761A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters

Landscapes

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

Abstract

PURPOSE:To automatically compensate the bias current without being affected due to temperature fluctuation, by connecting the resistor to the inverting input or non- inverting input of the operational amplifier to detect the bias current. CONSTITUTION:When the switch SW is OFF, the current ib flows to the resistor Rb, the output of the operational amplifier OP is Rbib(1+R2/R1), and when the switch SW is ON, the output of the amplifier OP is 0. When the switch SW is ON and OFF, the AC output corresponding to ib appears at the output of the amplifier OP and it superimposes on the DC signal voltage Eo=(R2/R1)Ei. The AC output which is sufficiently small to Eo is amplified A, rectified D, and given to the inverting or non-inverting terminal of the amplifier OP via the resistor R3 to reduce the AC output. If the gain of the amplifier A is sufficiently great, substantially Rbib is nearly equal to 0, the current ib is all fed through the resistor R3 to enable automatic compensation. With this constitution, fine current ib can be compensated with good precision by taking the resistor Rb and the gain of the amplifier A greater, through the use of conventional components.
JP7471478A 1978-06-20 1978-06-20 Bias current compensation circuit for operational amplifier Pending JPS551761A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7471478A JPS551761A (en) 1978-06-20 1978-06-20 Bias current compensation circuit for operational amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7471478A JPS551761A (en) 1978-06-20 1978-06-20 Bias current compensation circuit for operational amplifier

Publications (1)

Publication Number Publication Date
JPS551761A true JPS551761A (en) 1980-01-08

Family

ID=13555157

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7471478A Pending JPS551761A (en) 1978-06-20 1978-06-20 Bias current compensation circuit for operational amplifier

Country Status (1)

Country Link
JP (1) JPS551761A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63269902A (en) * 1987-04-28 1988-11-08 Kobashi Kogyo Co Ltd Device for mounting farm working machine
JPS646805U (en) * 1987-06-30 1989-01-13
EP2893638A4 (en) * 2012-09-10 2016-05-18 Crane Electronics Impedance compensation for operational amplifiers used in variable environments
US9419538B2 (en) 2011-02-24 2016-08-16 Crane Electronics, Inc. AC/DC power conversion system and method of manufacture of same
US9735566B1 (en) 2016-12-12 2017-08-15 Crane Electronics, Inc. Proactively operational over-voltage protection circuit
US9742183B1 (en) 2016-12-09 2017-08-22 Crane Electronics, Inc. Proactively operational over-voltage protection circuit
US9780635B1 (en) 2016-06-10 2017-10-03 Crane Electronics, Inc. Dynamic sharing average current mode control for active-reset and self-driven synchronous rectification for power converters
US9831768B2 (en) 2014-07-17 2017-11-28 Crane Electronics, Inc. Dynamic maneuvering configuration for multiple control modes in a unified servo system
US9979285B1 (en) 2017-10-17 2018-05-22 Crane Electronics, Inc. Radiation tolerant, analog latch peak current mode control for power converters
US10425080B1 (en) 2018-11-06 2019-09-24 Crane Electronics, Inc. Magnetic peak current mode control for radiation tolerant active driven synchronous power converters

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS519580A (en) * 1974-07-13 1976-01-26 Fujitsu Ltd

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS519580A (en) * 1974-07-13 1976-01-26 Fujitsu Ltd

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63269902A (en) * 1987-04-28 1988-11-08 Kobashi Kogyo Co Ltd Device for mounting farm working machine
JPS646805U (en) * 1987-06-30 1989-01-13
US9419538B2 (en) 2011-02-24 2016-08-16 Crane Electronics, Inc. AC/DC power conversion system and method of manufacture of same
EP2893638A4 (en) * 2012-09-10 2016-05-18 Crane Electronics Impedance compensation for operational amplifiers used in variable environments
US9831768B2 (en) 2014-07-17 2017-11-28 Crane Electronics, Inc. Dynamic maneuvering configuration for multiple control modes in a unified servo system
US9780635B1 (en) 2016-06-10 2017-10-03 Crane Electronics, Inc. Dynamic sharing average current mode control for active-reset and self-driven synchronous rectification for power converters
US9866100B2 (en) 2016-06-10 2018-01-09 Crane Electronics, Inc. Dynamic sharing average current mode control for active-reset and self-driven synchronous rectification for power converters
US9742183B1 (en) 2016-12-09 2017-08-22 Crane Electronics, Inc. Proactively operational over-voltage protection circuit
US9735566B1 (en) 2016-12-12 2017-08-15 Crane Electronics, Inc. Proactively operational over-voltage protection circuit
US9979285B1 (en) 2017-10-17 2018-05-22 Crane Electronics, Inc. Radiation tolerant, analog latch peak current mode control for power converters
US10425080B1 (en) 2018-11-06 2019-09-24 Crane Electronics, Inc. Magnetic peak current mode control for radiation tolerant active driven synchronous power converters

Similar Documents

Publication Publication Date Title
JPS57206113A (en) Amplifier for limiter
GB1425966A (en) True rms converter
JPS5359352A (en) Comparator
JPS551147A (en) Stabilized luminous source
JPS5582512A (en) Amplifier
JPS5481760A (en) Audio amplifier
DE3462951D1 (en) Measuring device to detect a temperature difference
JPS56164413A (en) Constant voltage circuit
JPS56140715A (en) Feedback-type limiting circuit
JPS5677710A (en) Zero-point adjusting circuit
JPS5696307A (en) Constant-current circuit
JPS57101443A (en) Bias controlling circuit
JPS57196607A (en) Amplifier
JPS5540901A (en) Photo signal observation unit
JPS57141160A (en) Optical receiver
JPS57193109A (en) Current amplifying circuit
JPS5698912A (en) Error amplifying circuit
JPS5591218A (en) Direct current amplifier circuit
JPS5711514A (en) Automatic level controller
JPS5671314A (en) Differential amplifying circuit
JPS5610266A (en) Current amplification factor measuring circuit
JPS54101245A (en) Amplifier
JPS5569819A (en) Constant voltage unit
JPS555559A (en) Integrated circuit
JPS57208704A (en) Detecting and amplifying circuit