JPS5633563A - Measuring device for amplifier - Google Patents

Measuring device for amplifier

Info

Publication number
JPS5633563A
JPS5633563A JP10995379A JP10995379A JPS5633563A JP S5633563 A JPS5633563 A JP S5633563A JP 10995379 A JP10995379 A JP 10995379A JP 10995379 A JP10995379 A JP 10995379A JP S5633563 A JPS5633563 A JP S5633563A
Authority
JP
Japan
Prior art keywords
input
terminals
measured
complementary symmetry
output
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
JP10995379A
Other languages
Japanese (ja)
Inventor
Shigeru Kawada
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 JP10995379A priority Critical patent/JPS5633563A/en
Publication of JPS5633563A publication Critical patent/JPS5633563A/en
Pending legal-status Critical Current

Links

Landscapes

  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

PURPOSE: To measure the input bias currents of a balance type amplifier with differential input terminals and complementary symmetry output terminals accurately by a method wherein negative feedback of two systems is provided among the complementary symmetry output terminals and the differential input terminals.
CONSTITUTION: A negative feedback circuit 2 is formed by connecting an input terminal II and an output terminal ON having an input and output transmitting characteristic of an antiphase of a balance type amplifier 1 with differential input terminals II, IN and complementary symmetry output terminals OI, ON, and a negative feedback circuit 3 is made up by similarly connecting the input terminal IN and the output terminal OI having an input and output characteristic of the antiphase. A switch SW1 is turned OFF and a switch SW2 is turned ON and differential voltage between the complementary symmetry output terminals is measured, the switches are reversed and the differential voltage is measured, and input bias currents are obtained from these values. Thus, the input bias currents can accurately be measured because great voltage between the complementary symmetry output terminals is measured.
COPYRIGHT: (C)1981,JPO&Japio
JP10995379A 1979-08-28 1979-08-28 Measuring device for amplifier Pending JPS5633563A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10995379A JPS5633563A (en) 1979-08-28 1979-08-28 Measuring device for amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10995379A JPS5633563A (en) 1979-08-28 1979-08-28 Measuring device for amplifier

Publications (1)

Publication Number Publication Date
JPS5633563A true JPS5633563A (en) 1981-04-04

Family

ID=14523308

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10995379A Pending JPS5633563A (en) 1979-08-28 1979-08-28 Measuring device for amplifier

Country Status (1)

Country Link
JP (1) JPS5633563A (en)

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