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JPS57200868A - Comparator for phase and frequency - Google Patents

Comparator for phase and frequency

Info

Publication number
JPS57200868A
JPS57200868A JP8646381A JP8646381A JPS57200868A JP S57200868 A JPS57200868 A JP S57200868A JP 8646381 A JP8646381 A JP 8646381A JP 8646381 A JP8646381 A JP 8646381A JP S57200868 A JPS57200868 A JP S57200868A
Authority
JP
Japan
Prior art keywords
phase
frequency
signal
output
detection signal
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
JP8646381A
Other languages
Japanese (ja)
Inventor
Hiroshi Mizuguchi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP8646381A priority Critical patent/JPS57200868A/en
Publication of JPS57200868A publication Critical patent/JPS57200868A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
    • G01R25/08—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents by counting of standard pulses

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Phase Differences (AREA)

Abstract

PURPOSE:To enable discrimination of the phase and frequency difference by comparing output signals according to a reference phase signal and a phase detection signal to retain the output at a specified value. CONSTITUTION:Repetition period of output signals of a trigger pulse generation circuit 100 depending on a reference phase signal PR and the repetition period of outputs of a trigger pulse generation circuit 200 depending on a phase detection signal PD are compared 500 and digital outputs depending on a phase difference between both signals are obtained only when the frequency of the reference phase signal equals the frequency of the phase detection signal. When the frequency of the phase detection signal is higher than the frequency of the reference phase signal, the output is retained at its minimum while when it lower, the output is retained at its maximum.
JP8646381A 1981-06-04 1981-06-04 Comparator for phase and frequency Pending JPS57200868A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8646381A JPS57200868A (en) 1981-06-04 1981-06-04 Comparator for phase and frequency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8646381A JPS57200868A (en) 1981-06-04 1981-06-04 Comparator for phase and frequency

Publications (1)

Publication Number Publication Date
JPS57200868A true JPS57200868A (en) 1982-12-09

Family

ID=13887640

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8646381A Pending JPS57200868A (en) 1981-06-04 1981-06-04 Comparator for phase and frequency

Country Status (1)

Country Link
JP (1) JPS57200868A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49131765A (en) * 1973-04-24 1974-12-17

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49131765A (en) * 1973-04-24 1974-12-17

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