JPS54105975A - Measurement circuit - Google Patents
Measurement circuitInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63190975U (en) * | 1987-05-29 | 1988-12-08 |
Families Citing this family (1)
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 |
-
1978
- 1978-02-08 JP JP1227878A patent/JPS54105975A/en active Granted
Cited By (1)
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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