JPS5593075A - Semiconductor integrated circuit - Google Patents

Semiconductor integrated circuit

Info

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
Application number
JP80579A
Other languages
Japanese (ja)
Inventor
Kazuo Tokushige
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP80579A priority Critical patent/JPS5593075A/en
Publication of JPS5593075A publication Critical patent/JPS5593075A/en
Pending legal-status Critical Current

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
JP80579A 1979-01-05 1979-01-05 Semiconductor integrated circuit Pending JPS5593075A (en)

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)

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