JPS5599844A - Frequency synthesizer - Google Patents

Frequency synthesizer

Info

Publication number
JPS5599844A
JPS5599844A JP673479A JP673479A JPS5599844A JP S5599844 A JPS5599844 A JP S5599844A JP 673479 A JP673479 A JP 673479A JP 673479 A JP673479 A JP 673479A JP S5599844 A JPS5599844 A JP S5599844A
Authority
JP
Japan
Prior art keywords
output
fed
frequency
comparator
branched
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
JP673479A
Other languages
Japanese (ja)
Other versions
JPS5829010B2 (en
Inventor
Tetsuo Yamamoto
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.)
Furuno Electric Co Ltd
Original Assignee
Furuno 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 Furuno Electric Co Ltd filed Critical Furuno Electric Co Ltd
Priority to JP54006734A priority Critical patent/JPS5829010B2/en
Publication of JPS5599844A publication Critical patent/JPS5599844A/en
Publication of JPS5829010B2 publication Critical patent/JPS5829010B2/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
    • H03L7/16—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
    • H03L7/183—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 time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number

Abstract

PURPOSE:To enable stable oscillation with a simple constitution, by variably frequency dividing the branched output of the voltage control oscillator, feeding it back to the phase comparator and forming the phase locked loop. CONSTITUTION:The reference oscillator 10 oscillates the signal of a constant frequency, and the output signal is frequency-divided with the variable frequency divider 20 according to the set frequency division number externally. Further, the output signal of the phase comparator 3 is fed to the voltage controlled oscillator 5 via LPF4 and is fed from the output terminal 6 as the oscillation output, the output is branched and fed to the variable frequency divider 7, frequency division is made and fed back to the comparator 3 to form the phase locked loop. Accordingly, stable oscillation can be made with a simple constitution.
JP54006734A 1979-01-23 1979-01-23 frequency synthesizer Expired JPS5829010B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54006734A JPS5829010B2 (en) 1979-01-23 1979-01-23 frequency synthesizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54006734A JPS5829010B2 (en) 1979-01-23 1979-01-23 frequency synthesizer

Publications (2)

Publication Number Publication Date
JPS5599844A true JPS5599844A (en) 1980-07-30
JPS5829010B2 JPS5829010B2 (en) 1983-06-20

Family

ID=11646449

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54006734A Expired JPS5829010B2 (en) 1979-01-23 1979-01-23 frequency synthesizer

Country Status (1)

Country Link
JP (1) JPS5829010B2 (en)

Also Published As

Publication number Publication date
JPS5829010B2 (en) 1983-06-20

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