JPS57200867A - Detector for frequency and phase - Google Patents

Detector for frequency and phase

Info

Publication number
JPS57200867A
JPS57200867A JP8646781A JP8646781A JPS57200867A JP S57200867 A JPS57200867 A JP S57200867A JP 8646781 A JP8646781 A JP 8646781A JP 8646781 A JP8646781 A JP 8646781A JP S57200867 A JPS57200867 A JP S57200867A
Authority
JP
Japan
Prior art keywords
phase
output
condition
reference value
frequency
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
JP8646781A
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 JP8646781A priority Critical patent/JPS57200867A/en
Publication of JPS57200867A publication Critical patent/JPS57200867A/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 improve responsiveness and a detecting property, by obtaining an output depending on a difference in phase of a phase detecting signal and a reference phase. CONSTITUTION:A measuring output of a counter 100 is compared with a reference value previously set, and digital comparator 900 generates different outputs, for example, A-C corresponding to a condition, for example, a condition that the measuring outputs is larger than the reference value, a condition that it coincides with the reference value, or a condition that it is smaller than the reference value. In the case of the output A, a program value being previously prepared is stored in a memory 400 by a phase detecting output correcting means 1000, in the case of the output B, an output of a counter 300, and in the case of the output C, other program value being previously prepared. As a result, only when a frequency of a detecting signal coincides with a reference frequency, a phase of a phase detecting signal and an output, depending on a phase difference of a reference phase, are obtained.
JP8646781A 1981-06-04 1981-06-04 Detector for frequency and phase Pending JPS57200867A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8646781A JPS57200867A (en) 1981-06-04 1981-06-04 Detector for frequency and phase

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8646781A JPS57200867A (en) 1981-06-04 1981-06-04 Detector for frequency and phase

Publications (1)

Publication Number Publication Date
JPS57200867A true JPS57200867A (en) 1982-12-09

Family

ID=13887756

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8646781A Pending JPS57200867A (en) 1981-06-04 1981-06-04 Detector for frequency and phase

Country Status (1)

Country Link
JP (1) JPS57200867A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49131765A (en) * 1973-04-24 1974-12-17
JPS54141176A (en) * 1978-04-26 1979-11-02 Toshiba Corp Discriminating method of commercial frequencies

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49131765A (en) * 1973-04-24 1974-12-17
JPS54141176A (en) * 1978-04-26 1979-11-02 Toshiba Corp Discriminating method of commercial frequencies

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