JPS5599079A - System for measuring line impedance - Google Patents

System for measuring line impedance

Info

Publication number
JPS5599079A
JPS5599079A JP694679A JP694679A JPS5599079A JP S5599079 A JPS5599079 A JP S5599079A JP 694679 A JP694679 A JP 694679A JP 694679 A JP694679 A JP 694679A JP S5599079 A JPS5599079 A JP S5599079A
Authority
JP
Japan
Prior art keywords
line
voltage
resistor
line impedance
power source
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
JP694679A
Other languages
Japanese (ja)
Inventor
Shigeru Kimura
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 JP694679A priority Critical patent/JPS5599079A/en
Publication of JPS5599079A publication Critical patent/JPS5599079A/en
Pending legal-status Critical Current

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Landscapes

  • Measurement Of Resistance Or Impedance (AREA)

Abstract

PURPOSE: To make it possible to measure a correct line impedance by supplying an AC voltage to a line to detect the phase difference between the same and the current flowing through the line.
CONSTITUTION: A line impedance 16 is excited by an AC power source 11 thourgh a resistor 12. The resistor 12 is for detecting the current flowing through the line as voltage drop at both ends of the resistor 12. When an AC voltage is supplied from the AC power source to the line. The voltage phase of the AC power source 11 and voltage phases at both ends of the resistor 12 are delivered respectively to a phase difference detecting circuit 15 in the form of rectangular waves through waveform shaping circuits 13 and 14, where the phase difference is detected thereby to measure a line impedance 16.
COPYRIGHT: (C)1980,JPO&Japio
JP694679A 1979-01-23 1979-01-23 System for measuring line impedance Pending JPS5599079A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP694679A JPS5599079A (en) 1979-01-23 1979-01-23 System for measuring line impedance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP694679A JPS5599079A (en) 1979-01-23 1979-01-23 System for measuring line impedance

Publications (1)

Publication Number Publication Date
JPS5599079A true JPS5599079A (en) 1980-07-28

Family

ID=11652390

Family Applications (1)

Application Number Title Priority Date Filing Date
JP694679A Pending JPS5599079A (en) 1979-01-23 1979-01-23 System for measuring line impedance

Country Status (1)

Country Link
JP (1) JPS5599079A (en)

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