JPS5669562A - Impedance measuring device - Google Patents

Impedance measuring device

Info

Publication number
JPS5669562A
JPS5669562A JP14538079A JP14538079A JPS5669562A JP S5669562 A JPS5669562 A JP S5669562A JP 14538079 A JP14538079 A JP 14538079A JP 14538079 A JP14538079 A JP 14538079A JP S5669562 A JPS5669562 A JP S5669562A
Authority
JP
Japan
Prior art keywords
circuit
measured
impedance
signal
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
JP14538079A
Other languages
Japanese (ja)
Inventor
Susumu Hasegawa
Michihiko Kusunoki
Satoshi Yamazaki
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP14538079A priority Critical patent/JPS5669562A/en
Publication of JPS5669562A publication Critical patent/JPS5669562A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Resistance Or Impedance (AREA)

Abstract

PURPOSE: To measure the impedance without being influenced by the capacity of a circuit, inductivity by detecting current flowing in a circuit to be measured by a pick up coil wound on an toroidal core.
CONSTITUTION: The current flowing through a circuit 2 to be measured through a pick up coil wound on an toroidal core 8 by a differential amplifier 16, and converted into a square wave by a converter 17. Then, this signal and the signal obtained by converting the output signal of an oscillator 11 into a square wave by a converter 18 are compared in phase and rectified 20, and the phase difference between the current flowing through the circuit to be measured and the output voltage of the oscillator 11, that is, the phase angle of impedance is displayed 21. Also, the direct current signal produced by rectifying 22 the output of the differential amplifier 16 is divided 24 by the direct current signal rectified 23 by the output of the oscillator 11, then the result is displayed 25 as the absolute value of the impedance of the circuit to be measured. Thus, irrespective of the capacity of the impedance of the circuit to be measured and inductivity, a stable measurement is done.
COPYRIGHT: (C)1981,JPO&Japio
JP14538079A 1979-11-12 1979-11-12 Impedance measuring device Pending JPS5669562A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14538079A JPS5669562A (en) 1979-11-12 1979-11-12 Impedance measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14538079A JPS5669562A (en) 1979-11-12 1979-11-12 Impedance measuring device

Publications (1)

Publication Number Publication Date
JPS5669562A true JPS5669562A (en) 1981-06-10

Family

ID=15383895

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14538079A Pending JPS5669562A (en) 1979-11-12 1979-11-12 Impedance measuring device

Country Status (1)

Country Link
JP (1) JPS5669562A (en)

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