JPS5580924A - Phase comparator - Google Patents

Phase comparator

Info

Publication number
JPS5580924A
JPS5580924A JP15420778A JP15420778A JPS5580924A JP S5580924 A JPS5580924 A JP S5580924A JP 15420778 A JP15420778 A JP 15420778A JP 15420778 A JP15420778 A JP 15420778A JP S5580924 A JPS5580924 A JP S5580924A
Authority
JP
Japan
Prior art keywords
voltage
output
circuit
converter
frequency component
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
JP15420778A
Other languages
Japanese (ja)
Other versions
JPS5915569B2 (en
Inventor
Shinichi Kawada
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP53154207A priority Critical patent/JPS5915569B2/en
Publication of JPS5580924A publication Critical patent/JPS5580924A/en
Publication of JPS5915569B2 publication Critical patent/JPS5915569B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop

Landscapes

  • Manipulation Of Pulses (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To reduce the high frequency component contained in the control voltage by obtaining the control voltage from the output frequency of the voltage control oscillator via the D/A converter circuit and the sample holding circuit. CONSTITUTION:Output frequency MNf0 of voltage control oscillator is divided through MN divider and then sent to D/A converter 12. The output voltage of converter 12 rises up in steps with every input of the output pulse of divider 11 and then reset in the fO cycle. This staircase waveform is sampled in the fr cycle to be applied to low band pass filter 9 after the voltage is held at holding circuit 14. The frequency component of the impulsive noise caused by the gate pulse of gate circuit 13 is extremely high, and the high frequency component contained in the output DC voltage of circuit 14 is small. As a result, the degree of designing freedom is increased for filter 9.
JP53154207A 1978-12-15 1978-12-15 phase comparator Expired JPS5915569B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53154207A JPS5915569B2 (en) 1978-12-15 1978-12-15 phase comparator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53154207A JPS5915569B2 (en) 1978-12-15 1978-12-15 phase comparator

Publications (2)

Publication Number Publication Date
JPS5580924A true JPS5580924A (en) 1980-06-18
JPS5915569B2 JPS5915569B2 (en) 1984-04-10

Family

ID=15579175

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53154207A Expired JPS5915569B2 (en) 1978-12-15 1978-12-15 phase comparator

Country Status (1)

Country Link
JP (1) JPS5915569B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6077526A (en) * 1983-10-05 1985-05-02 Fujitsu Ltd Phase synchronism circuit
JPH01117420A (en) * 1987-10-29 1989-05-10 Nec Corp Phase comparator

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6455065U (en) * 1987-10-01 1989-04-05
JPH0528054Y2 (en) * 1987-10-01 1993-07-19
JPS6455062U (en) * 1987-10-01 1989-04-05
JPS6455066U (en) * 1987-10-01 1989-04-05

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6077526A (en) * 1983-10-05 1985-05-02 Fujitsu Ltd Phase synchronism circuit
JPH01117420A (en) * 1987-10-29 1989-05-10 Nec Corp Phase comparator

Also Published As

Publication number Publication date
JPS5915569B2 (en) 1984-04-10

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