JPS54105975A - Measurement circuit - Google Patents

Measurement circuit

Info

Publication number
JPS54105975A
JPS54105975A JP1227878A JP1227878A JPS54105975A JP S54105975 A JPS54105975 A JP S54105975A JP 1227878 A JP1227878 A JP 1227878A JP 1227878 A JP1227878 A JP 1227878A JP S54105975 A JPS54105975 A JP S54105975A
Authority
JP
Japan
Prior art keywords
resistance
switch
amplifier
input
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
JP1227878A
Other languages
Japanese (ja)
Other versions
JPS5734908B2 (en
Inventor
Shinichi Hanayama
Keiichi Kobayashi
Hiroshi Okamoto
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.)
ASIA SEISAKUSHO KK
Toshiba Corp
Original Assignee
ASIA SEISAKUSHO KK
Toshiba Corp
Tokyo Shibaura Electric Co 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 ASIA SEISAKUSHO KK, Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical ASIA SEISAKUSHO KK
Priority to JP1227878A priority Critical patent/JPS54105975A/en
Publication of JPS54105975A publication Critical patent/JPS54105975A/en
Publication of JPS5734908B2 publication Critical patent/JPS5734908B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Testing Of Individual Semiconductor Devices (AREA)

Abstract

PURPOSE: To eliminate the high-voltage spike noise which is caused when the constant current is switched to the constant voltage for the circuit which measures the current flowing to the transistor or the like, the drop voltage and others, by connecting the feedback resistance between the input and output terminals of the operational amplifier constituting the measurement circuit.
CONSTITUTION: The reference voltage delivered from D/A converter 21 is supplied to operational amplifier 24 via input resistance 22 and switch 23, and the serial circuit comprising switch 25 and resistance 26 is inserted between the input and output terminals of amplifier 24. Then the output signal of amplifier 24 is supplied to operational amplifier 28 connected to the buffer via resistance 27 as well as to semiconductor device 29 to be measured. In this case, noise eliminating capacitor 30 and switch 31 are connected in parallel to resistance 27, and at the same time the output of amplifier 28 is fed back to the junction of resistance 22 and switch 23 via switch 32 and feedback resistance 33. In such way, the occurrence of the malfunction can be avoided.
COPYRIGHT: (C)1979,JPO&Japio
JP1227878A 1978-02-08 1978-02-08 Measurement circuit Granted JPS54105975A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1227878A JPS54105975A (en) 1978-02-08 1978-02-08 Measurement circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1227878A JPS54105975A (en) 1978-02-08 1978-02-08 Measurement circuit

Publications (2)

Publication Number Publication Date
JPS54105975A true JPS54105975A (en) 1979-08-20
JPS5734908B2 JPS5734908B2 (en) 1982-07-26

Family

ID=11800889

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1227878A Granted JPS54105975A (en) 1978-02-08 1978-02-08 Measurement circuit

Country Status (1)

Country Link
JP (1) JPS54105975A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63190975U (en) * 1987-05-29 1988-12-08

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60121630A (en) * 1983-12-02 1985-06-29 田中貴金属工業株式会社 Electric contactor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63190975U (en) * 1987-05-29 1988-12-08

Also Published As

Publication number Publication date
JPS5734908B2 (en) 1982-07-26

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