JPS5525206A - Synchronous supervisory system - Google Patents

Synchronous supervisory system

Info

Publication number
JPS5525206A
JPS5525206A JP9719278A JP9719278A JPS5525206A JP S5525206 A JPS5525206 A JP S5525206A JP 9719278 A JP9719278 A JP 9719278A JP 9719278 A JP9719278 A JP 9719278A JP S5525206 A JPS5525206 A JP S5525206A
Authority
JP
Japan
Prior art keywords
signal
synchronous
supplied
phase
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
JP9719278A
Other languages
Japanese (ja)
Inventor
Akihisa Inagaki
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.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP9719278A priority Critical patent/JPS5525206A/en
Publication of JPS5525206A publication Critical patent/JPS5525206A/en
Pending 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

Landscapes

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

Abstract

PURPOSE:To secure an assured detection of the step-out in the automatic frequency control loop in a high response speed by combining the 90 deg.-phase shifter and the phase detector for synchronous advisory. CONSTITUTION:The automatic frequency control loop comprises frequency converter 2, synchronous signal detection filter 4, phase detector 7 and voltage control oscillator 6 each. The signal supplied at signal input point 1 is delivered to signal output point 3 after the frequency conversion. While the synchronous signal detected through synchronous signal detection filter 4 is supplied also to 90 deg.-phase shifter 13 and then supplied to synchronous supervisory phase detector 14 in the form of the signal featuring the 90 deg. phase advance to the input synchronous signal. The output of oscillator 6 is supplied to detector 14, and the phase difference of the above two input is detected. This output voltage is drawn out after comparison with alarm setting voltage 16 at comparator 17 to drive alarm display unit 11.
JP9719278A 1978-08-11 1978-08-11 Synchronous supervisory system Pending JPS5525206A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9719278A JPS5525206A (en) 1978-08-11 1978-08-11 Synchronous supervisory system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9719278A JPS5525206A (en) 1978-08-11 1978-08-11 Synchronous supervisory system

Publications (1)

Publication Number Publication Date
JPS5525206A true JPS5525206A (en) 1980-02-22

Family

ID=14185712

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9719278A Pending JPS5525206A (en) 1978-08-11 1978-08-11 Synchronous supervisory system

Country Status (1)

Country Link
JP (1) JPS5525206A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4499434A (en) * 1982-07-19 1985-02-12 Rockwell International Corporation PLL Phase error alarm related to associated receiver
JPS60158725A (en) * 1984-01-30 1985-08-20 Toshiba Corp Step-out detecting system of clock reproduction circuit
JPH01162417A (en) * 1987-11-20 1989-06-26 Motorola Inc Frequency synthesizer equipped with digital phase detector having optimum steering and level type locking display

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4499434A (en) * 1982-07-19 1985-02-12 Rockwell International Corporation PLL Phase error alarm related to associated receiver
JPS60158725A (en) * 1984-01-30 1985-08-20 Toshiba Corp Step-out detecting system of clock reproduction circuit
JPH01162417A (en) * 1987-11-20 1989-06-26 Motorola Inc Frequency synthesizer equipped with digital phase detector having optimum steering and level type locking display

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