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JPS52120661A - Automatic frequency control unit - Google Patents

Automatic frequency control unit

Info

Publication number
JPS52120661A
JPS52120661A JP3753076A JP3753076A JPS52120661A JP S52120661 A JPS52120661 A JP S52120661A JP 3753076 A JP3753076 A JP 3753076A JP 3753076 A JP3753076 A JP 3753076A JP S52120661 A JPS52120661 A JP S52120661A
Authority
JP
Japan
Prior art keywords
control unit
automatic frequency
frequency control
voltage
freuqnecy
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
JP3753076A
Other languages
Japanese (ja)
Inventor
Kaoru Sawada
Shigeru Igawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP3753076A priority Critical patent/JPS52120661A/en
Publication of JPS52120661A publication Critical patent/JPS52120661A/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
    • H03L7/08—Details of the phase-locked loop

Landscapes

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

Abstract

PURPOSE:To ensure the accuracy of freuqnecy, by opening the control loop and giving a fixed voltage to the voltage control type oscilaltor, and preventing the oscillator runaway, when external frequency to the automatic frequency control unit used for carrier pilot telephone unit fluctuates more than a constant range.
JP3753076A 1976-04-02 1976-04-02 Automatic frequency control unit Pending JPS52120661A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3753076A JPS52120661A (en) 1976-04-02 1976-04-02 Automatic frequency control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3753076A JPS52120661A (en) 1976-04-02 1976-04-02 Automatic frequency control unit

Publications (1)

Publication Number Publication Date
JPS52120661A true JPS52120661A (en) 1977-10-11

Family

ID=12500082

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3753076A Pending JPS52120661A (en) 1976-04-02 1976-04-02 Automatic frequency control unit

Country Status (1)

Country Link
JP (1) JPS52120661A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54154248A (en) * 1978-05-26 1979-12-05 Fujitsu Ltd Pll circuit
JPS58131820A (en) * 1982-01-29 1983-08-05 Nec Corp Phase locked loop circuit
JPS5989038A (en) * 1982-11-12 1984-05-23 Victor Co Of Japan Ltd Phase locked loop circuit
JPS642419A (en) * 1987-06-25 1989-01-06 Sony Corp Pll circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54154248A (en) * 1978-05-26 1979-12-05 Fujitsu Ltd Pll circuit
JPS58131820A (en) * 1982-01-29 1983-08-05 Nec Corp Phase locked loop circuit
JPH0353813B2 (en) * 1982-01-29 1991-08-16
JPS5989038A (en) * 1982-11-12 1984-05-23 Victor Co Of Japan Ltd Phase locked loop circuit
JPS642419A (en) * 1987-06-25 1989-01-06 Sony Corp Pll circuit

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