JPS54850A - Digital afc circuit - Google Patents

Digital afc circuit

Info

Publication number
JPS54850A
JPS54850A JP6593877A JP6593877A JPS54850A JP S54850 A JPS54850 A JP S54850A JP 6593877 A JP6593877 A JP 6593877A JP 6593877 A JP6593877 A JP 6593877A JP S54850 A JPS54850 A JP S54850A
Authority
JP
Japan
Prior art keywords
afc circuit
digital afc
circuit
digital
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
JP6593877A
Other languages
Japanese (ja)
Inventor
Kunio Tano
Tatsuo Haruno
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 JP6593877A priority Critical patent/JPS54850A/en
Publication of JPS54850A publication Critical patent/JPS54850A/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
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/181—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a numerical count result being used for locking the loop, the counter counting during fixed time intervals

Landscapes

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

Abstract

PURPOSE:To obtain a high-stability and low-cost AFC circuit by using a digital circuit comprising the frequency/period counter and a subtractor as the frequency error detector circuit.
JP6593877A 1977-06-03 1977-06-03 Digital afc circuit Pending JPS54850A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6593877A JPS54850A (en) 1977-06-03 1977-06-03 Digital afc circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6593877A JPS54850A (en) 1977-06-03 1977-06-03 Digital afc circuit

Publications (1)

Publication Number Publication Date
JPS54850A true JPS54850A (en) 1979-01-06

Family

ID=13301395

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6593877A Pending JPS54850A (en) 1977-06-03 1977-06-03 Digital afc circuit

Country Status (1)

Country Link
JP (1) JPS54850A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56169437A (en) * 1980-05-30 1981-12-26 Toshiba Corp Oscillator
JPS56169436A (en) * 1980-05-30 1981-12-26 Toshiba Corp Oscillator
FR2512608A1 (en) * 1981-09-04 1983-03-11 Tektronix Inc PROGRAMMABLE ELECTRICAL SIGNAL GENERATOR
JPS59167722A (en) * 1983-03-14 1984-09-21 Kokusai Kikai Shindo Kenkyusho:Kk Automatic oscillation controller
JPS61501184A (en) * 1984-02-09 1986-06-12 アメリカン テレフオン アンド テレグラフ カムパニ− Precisely controlled frequency synthesizer for use under unstable and fluctuating input frequencies

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56169437A (en) * 1980-05-30 1981-12-26 Toshiba Corp Oscillator
JPS56169436A (en) * 1980-05-30 1981-12-26 Toshiba Corp Oscillator
FR2512608A1 (en) * 1981-09-04 1983-03-11 Tektronix Inc PROGRAMMABLE ELECTRICAL SIGNAL GENERATOR
JPS59167722A (en) * 1983-03-14 1984-09-21 Kokusai Kikai Shindo Kenkyusho:Kk Automatic oscillation controller
JPS61501184A (en) * 1984-02-09 1986-06-12 アメリカン テレフオン アンド テレグラフ カムパニ− Precisely controlled frequency synthesizer for use under unstable and fluctuating input frequencies

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