JPS6014522A - Generator for clock signal synchronized with digital signal - Google Patents

Generator for clock signal synchronized with digital signal

Info

Publication number
JPS6014522A
JPS6014522A JP58122603A JP12260383A JPS6014522A JP S6014522 A JPS6014522 A JP S6014522A JP 58122603 A JP58122603 A JP 58122603A JP 12260383 A JP12260383 A JP 12260383A JP S6014522 A JPS6014522 A JP S6014522A
Authority
JP
Japan
Prior art keywords
signal
frequency
clock signal
synchronized
signals
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
JP58122603A
Other languages
Japanese (ja)
Inventor
Takashi Ito
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP58122603A priority Critical patent/JPS6014522A/en
Publication of JPS6014522A publication Critical patent/JPS6014522A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03LAUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00Automatic control of frequency or phase; Synchronisation
    • H03L7/06Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08Details of the phase-locked loop
    • H03L7/085Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
    • H03L7/087Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using at least two phase detectors or a frequency and phase detector in the loop

Abstract

PURPOSE:To obtain a stable clock signal in a capture range by dividing the frequency of the output of a variable frequency oscillating circuit by N to generate a reference frequency approximating 1/N of the bit frequency of an input signal and detecting a phase difference between both signals and controlling said oscillating circuit by the detection output. CONSTITUTION:If it is detected that a clock signal is not synchronized with a digital signal A to close a switch 6, the phase of an output frequency-divided clock signal E of a frequency divider 3 and that of a reference clock signal F are compared with each other. At this time, frequencies fE and fF are 1/N of fc and fb, and the frequency diference and the phase difference between fc and fb are 1/N, and the signal E is synchronized with the signal F even in case of a slight deviation between fc and fb because signals E and F are inverted at intervals of a half period. Consequently, a clock signal c is synchronized with the digital signal A easily when the switch 6 is opened. Thus, an integer N and the frequency fF are so selected that N.fFapprox.=fb is true, and a phase difference G between signals F and E is applied to an oscillating circuit 2 to synchronize them, and thereafter, the signal C is synchronized with the signal A. An LPF7 raises the gain of a phase synchronizing loop to extend the capture range.
JP58122603A 1983-07-06 1983-07-06 Generator for clock signal synchronized with digital signal Pending JPS6014522A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58122603A JPS6014522A (en) 1983-07-06 1983-07-06 Generator for clock signal synchronized with digital signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58122603A JPS6014522A (en) 1983-07-06 1983-07-06 Generator for clock signal synchronized with digital signal

Publications (1)

Publication Number Publication Date
JPS6014522A true JPS6014522A (en) 1985-01-25

Family

ID=14840023

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58122603A Pending JPS6014522A (en) 1983-07-06 1983-07-06 Generator for clock signal synchronized with digital signal

Country Status (1)

Country Link
JP (1) JPS6014522A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0239623A (en) * 1988-07-28 1990-02-08 Nec Corp Pll circuit
JPH02127817A (en) * 1988-11-07 1990-05-16 Nec Corp Phase locked loop oscillator
JPH0440117A (en) * 1990-06-06 1992-02-10 Fujitsu Ltd Pll circuit
US5097219A (en) * 1988-12-15 1992-03-17 Mitsubishi Denki Kabushiki Kaisha Pll for controlling frequency deviation of a variable frequency oscillator
JPH05129942A (en) * 1991-11-08 1993-05-25 Matsushita Electric Ind Co Ltd Pll circuit
US5384291A (en) * 1993-06-25 1995-01-24 The Dow Chemical Company Carbothermal synthesis precursors

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57106241A (en) * 1980-10-31 1982-07-02 Westinghouse Electric Corp Phase lock loop

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57106241A (en) * 1980-10-31 1982-07-02 Westinghouse Electric Corp Phase lock loop

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0239623A (en) * 1988-07-28 1990-02-08 Nec Corp Pll circuit
JPH02127817A (en) * 1988-11-07 1990-05-16 Nec Corp Phase locked loop oscillator
US5097219A (en) * 1988-12-15 1992-03-17 Mitsubishi Denki Kabushiki Kaisha Pll for controlling frequency deviation of a variable frequency oscillator
JPH0440117A (en) * 1990-06-06 1992-02-10 Fujitsu Ltd Pll circuit
JPH05129942A (en) * 1991-11-08 1993-05-25 Matsushita Electric Ind Co Ltd Pll circuit
US5384291A (en) * 1993-06-25 1995-01-24 The Dow Chemical Company Carbothermal synthesis precursors

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