JPS56107632A - Phase comparing circuit - Google Patents

Phase comparing circuit

Info

Publication number
JPS56107632A
JPS56107632A JP973280A JP973280A JPS56107632A JP S56107632 A JPS56107632 A JP S56107632A JP 973280 A JP973280 A JP 973280A JP 973280 A JP973280 A JP 973280A JP S56107632 A JPS56107632 A JP S56107632A
Authority
JP
Japan
Prior art keywords
output
circuit
terminal
clock
input
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
JP973280A
Other languages
Japanese (ja)
Inventor
Toshio Iyota
Haruo Tsuda
Takayuki Okino
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP973280A priority Critical patent/JPS56107632A/en
Publication of JPS56107632A publication Critical patent/JPS56107632A/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
    • G01R25/005—Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller, or for passing one of the input signals as output signal

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manipulation Of Pulses (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To expand the operation range by making it possible to obtain the phase comparison output even in the period of pulse width of the reset pulse in the phase comparator circuit for which the FF is used. CONSTITUTION:The input clock which has been provided to the terminal 11 is applied to the reset terminal R of the FF13 after its rise has been detected by the rise detecting circuit 12. Also, the output clock which has been provided to the terminal 22 is applied to the clock terminal C of the FF13, a signal of pulse width corresponding to the phase difference of the input/output clocks is output from the terminal Q', and it is applied to the switching circuit 20. Moreover, the input/ output clocks are applied to the exclusive ''or'' circuit 14 and the logical product circuit 15, and the outputs are also applied to the switching circuit 20. On the other hand, the FF19 is set and reset in case when the output clock is ''1'' and ''0'', respectively, when there is an output of the rise detecting circuit 12. And, the switching circuit 20 selects an output of the logical product circut 15 and an output of the FF13, in case when the output of the FF19 is ''1'', and ''0'', respectively.
JP973280A 1980-01-30 1980-01-30 Phase comparing circuit Pending JPS56107632A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP973280A JPS56107632A (en) 1980-01-30 1980-01-30 Phase comparing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP973280A JPS56107632A (en) 1980-01-30 1980-01-30 Phase comparing circuit

Publications (1)

Publication Number Publication Date
JPS56107632A true JPS56107632A (en) 1981-08-26

Family

ID=11728478

Family Applications (1)

Application Number Title Priority Date Filing Date
JP973280A Pending JPS56107632A (en) 1980-01-30 1980-01-30 Phase comparing circuit

Country Status (1)

Country Link
JP (1) JPS56107632A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63234717A (en) * 1987-03-24 1988-09-30 Nec Corp Phase comparing circuit
US6959061B1 (en) 1998-10-07 2005-10-25 Fujitsu Limited Phase comparator circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63234717A (en) * 1987-03-24 1988-09-30 Nec Corp Phase comparing circuit
US6959061B1 (en) 1998-10-07 2005-10-25 Fujitsu Limited Phase comparator circuit

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