JPS5682410A - Electric current operational amplifier - Google Patents

Electric current operational amplifier

Info

Publication number
JPS5682410A
JPS5682410A JP16068579A JP16068579A JPS5682410A JP S5682410 A JPS5682410 A JP S5682410A JP 16068579 A JP16068579 A JP 16068579A JP 16068579 A JP16068579 A JP 16068579A JP S5682410 A JPS5682410 A JP S5682410A
Authority
JP
Japan
Prior art keywords
current
input
output
circuit
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.)
Granted
Application number
JP16068579A
Other languages
Japanese (ja)
Other versions
JPH0231325B2 (en
Inventor
Minoru Odajima
Toshinori Ogawara
Akira Nakamura
Yukikiyo Ando
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 JP16068579A priority Critical patent/JPS5682410A/en
Publication of JPS5682410A publication Critical patent/JPS5682410A/en
Publication of JPH0231325B2 publication Critical patent/JPH0231325B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

PURPOSE:To make the amplifier useful as that which is used for a reference contact compensator of the thermocouple, with its simple constitution, by receiving an output of the operational amplifier for receiving an external current and a reference current, outputting three currents which correspond to each other and vary, from the current Miller circuit, and processing these current by the current operational circuit. CONSTITUTION:Q1-Q2 show transistors. An external current IIN and a reference current IB from the reference current source B are input to the operational amplifier A, its output drives Q1-Q4 through Q9, and a current I from the current circuits Q2-Q4 is fed back to the input addition point of the amplifier A. An output current IL2 of Q4 is input to the absolute value circuit D consisting of a current Miller circuit formed by Q11 and Q12, and a current IA having the equal magnitude as IL2 is output. On the other hand, when a code of the input adding current is reverse, the circuits of Q10, Q5-Q8 execute the same operation. Corresponding to this current IA, a current IS being proportional to I<2> and a current LL1 from Q3 are input to the current voltage transducer F from the square-law arithmetic circuit consisting of Q13-Q22, and the voltage V0 expressed by the quadratic equation of I is output. This circuit is simple and also high in accuracy.
JP16068579A 1979-12-10 1979-12-10 Electric current operational amplifier Granted JPS5682410A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16068579A JPS5682410A (en) 1979-12-10 1979-12-10 Electric current operational amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16068579A JPS5682410A (en) 1979-12-10 1979-12-10 Electric current operational amplifier

Publications (2)

Publication Number Publication Date
JPS5682410A true JPS5682410A (en) 1981-07-06
JPH0231325B2 JPH0231325B2 (en) 1990-07-12

Family

ID=15720246

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16068579A Granted JPS5682410A (en) 1979-12-10 1979-12-10 Electric current operational amplifier

Country Status (1)

Country Link
JP (1) JPS5682410A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10434628B2 (en) 2017-06-26 2019-10-08 X'pole Precision Tools Inc. Grinding machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10434628B2 (en) 2017-06-26 2019-10-08 X'pole Precision Tools Inc. Grinding machine

Also Published As

Publication number Publication date
JPH0231325B2 (en) 1990-07-12

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