JPS57190426A - Phase synchronizing loop controlling circuit - Google Patents

Phase synchronizing loop controlling circuit

Info

Publication number
JPS57190426A
JPS57190426A JP56075232A JP7523281A JPS57190426A JP S57190426 A JPS57190426 A JP S57190426A JP 56075232 A JP56075232 A JP 56075232A JP 7523281 A JP7523281 A JP 7523281A JP S57190426 A JPS57190426 A JP S57190426A
Authority
JP
Japan
Prior art keywords
output
frequency
control
frequency divider
circuit
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
JP56075232A
Other languages
Japanese (ja)
Inventor
Masao Kayahara
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP56075232A priority Critical patent/JPS57190426A/en
Publication of JPS57190426A publication Critical patent/JPS57190426A/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
    • H03L7/183—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 set up timing for transmitting a frequency dividing ratio setting signal by connecting an output terminal of a reference frequency divider to a control circuit part to control the output by the timing of the frequency dividing ratio setting signal to a programmable frequency divider. CONSTITUTION:When the frequency and phase of an output from a reference frequency divider 3 coincides with that of an output from a programmable frequency divider 8 in a PLL circuit 1, an output of a phase detecting circuit 4 is ''0'' and the output voltage of a filter circuit 5 and the oscillation frequency of a voltage control oscillator 6 are made constant. When the timing of a frequency dividing ratio setting signal from a control circuit part 9 is controlled by the output of the standard frequency divider 3, the control means corresponds to an output obtained by dividing the oscillation frequency of a circuit to which a quartz oscillator is connected, setting up the control time precisely.
JP56075232A 1981-05-18 1981-05-18 Phase synchronizing loop controlling circuit Pending JPS57190426A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56075232A JPS57190426A (en) 1981-05-18 1981-05-18 Phase synchronizing loop controlling circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56075232A JPS57190426A (en) 1981-05-18 1981-05-18 Phase synchronizing loop controlling circuit

Publications (1)

Publication Number Publication Date
JPS57190426A true JPS57190426A (en) 1982-11-24

Family

ID=13570264

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56075232A Pending JPS57190426A (en) 1981-05-18 1981-05-18 Phase synchronizing loop controlling circuit

Country Status (1)

Country Link
JP (1) JPS57190426A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5619233A (en) * 1979-07-25 1981-02-23 Nippon Gakki Seizo Kk Synthesizer tuner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5619233A (en) * 1979-07-25 1981-02-23 Nippon Gakki Seizo Kk Synthesizer tuner

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