JPS5593075A - Semiconductor integrated circuit - Google Patents
Semiconductor integrated circuitInfo
- Publication number
- JPS5593075A JPS5593075A JP80579A JP80579A JPS5593075A JP S5593075 A JPS5593075 A JP S5593075A JP 80579 A JP80579 A JP 80579A JP 80579 A JP80579 A JP 80579A JP S5593075 A JPS5593075 A JP S5593075A
- Authority
- JP
- Japan
- Prior art keywords
- impedance
- input
- integrated circuit
- voltmeter
- measure
- 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
Links
Landscapes
- Testing Of Individual Semiconductor Devices (AREA)
Abstract
PURPOSE: To make it possible to measure an impedance circuit in an integrated circuit with high precision by measuring the quantity of electricity of the circuit formed on the same semiconductor substrate after impedance conversion by an operational amplifier.
CONSTITUTION: On the same semiconductor substrate, high-input impedance operational amplifier A with an input MOS field effect transistor is formed and the output of the amplifier A is feedback-connected to the input for use as a voltage follower for impedance conversion, which is interposed between measured resistor R and voltmeter V to measure a current from constant-current source I. The gain of the voltage follower is "1" and its outut impedance is extremely low enough to ignore the input impedance of voltmeter V, thereby improving measurement precision.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP80579A JPS5593075A (en) | 1979-01-05 | 1979-01-05 | Semiconductor integrated circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP80579A JPS5593075A (en) | 1979-01-05 | 1979-01-05 | Semiconductor integrated circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5593075A true JPS5593075A (en) | 1980-07-15 |
Family
ID=11483892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP80579A Pending JPS5593075A (en) | 1979-01-05 | 1979-01-05 | Semiconductor integrated circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5593075A (en) |
-
1979
- 1979-01-05 JP JP80579A patent/JPS5593075A/en active Pending
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