JPS55134508A - Phase difference detecting circuit - Google Patents

Phase difference detecting circuit

Info

Publication number
JPS55134508A
JPS55134508A JP4232579A JP4232579A JPS55134508A JP S55134508 A JPS55134508 A JP S55134508A JP 4232579 A JP4232579 A JP 4232579A JP 4232579 A JP4232579 A JP 4232579A JP S55134508 A JPS55134508 A JP S55134508A
Authority
JP
Japan
Prior art keywords
circuit
phase difference
voltage
comparator
counter
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.)
Granted
Application number
JP4232579A
Other languages
Japanese (ja)
Other versions
JPS6151805B2 (en
Inventor
Naoyuki Konishi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP4232579A priority Critical patent/JPS55134508A/en
Publication of JPS55134508A publication Critical patent/JPS55134508A/en
Publication of JPS6151805B2 publication Critical patent/JPS6151805B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations
    • H03D13/001—Circuits for comparing the phase or frequency of two mutually-independent oscillations in which a pulse counter is used followed by a conversion into an analog signal
    • H03D13/002—Circuits for comparing the phase or frequency of two mutually-independent oscillations in which a pulse counter is used followed by a conversion into an analog signal the counter being an up-down counter

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Phase Differences (AREA)

Abstract

PURPOSE:To make it possible to detect a phase difference stably by providing a feedback circuit which compensates an offset voltage and drift automatically. CONSTITUTION:Analog comparators 3 and 4 are applied with an AC voltage to be measured and a reference AC voltage respectively. The output of comparator 3 is led to phase difference counter 13 via exclusive-OR circuit 101 which provides exclusive-OR of the rising side of the reference voltage, and that of comparator 4 to phase counter 104 via exclusive-OR circuit 102 which provides exclusive-OR of the falling side of the reference voltage. The output of counter 13 is supplied to latch circuit 14 to find a difference between counters 13 and 104 and feedback to comparator 4 comes into effect so that the difference will be eliminated. Thus, feedback circuit 115 following OR circuit 102 is provided, and consequently the phase difference can be detected stably all the time by automatically compensating the offset voltage and drift.
JP4232579A 1979-04-06 1979-04-06 Phase difference detecting circuit Granted JPS55134508A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4232579A JPS55134508A (en) 1979-04-06 1979-04-06 Phase difference detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4232579A JPS55134508A (en) 1979-04-06 1979-04-06 Phase difference detecting circuit

Publications (2)

Publication Number Publication Date
JPS55134508A true JPS55134508A (en) 1980-10-20
JPS6151805B2 JPS6151805B2 (en) 1986-11-11

Family

ID=12632848

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4232579A Granted JPS55134508A (en) 1979-04-06 1979-04-06 Phase difference detecting circuit

Country Status (1)

Country Link
JP (1) JPS55134508A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05175737A (en) * 1991-10-31 1993-07-13 Nec Corp Sample-and-hold type phase comparator circuit
DE10035967A1 (en) * 2000-07-24 2001-11-08 Siemens Ag Method and device for determining phase difference between output signals from an opto-mechanical transmitting device sets counter devices going through trigger events from first and second signals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05175737A (en) * 1991-10-31 1993-07-13 Nec Corp Sample-and-hold type phase comparator circuit
DE10035967A1 (en) * 2000-07-24 2001-11-08 Siemens Ag Method and device for determining phase difference between output signals from an opto-mechanical transmitting device sets counter devices going through trigger events from first and second signals

Also Published As

Publication number Publication date
JPS6151805B2 (en) 1986-11-11

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