JPS6449176A - Pll circuit - Google Patents

Pll circuit

Info

Publication number
JPS6449176A
JPS6449176A JP62205015A JP20501587A JPS6449176A JP S6449176 A JPS6449176 A JP S6449176A JP 62205015 A JP62205015 A JP 62205015A JP 20501587 A JP20501587 A JP 20501587A JP S6449176 A JPS6449176 A JP S6449176A
Authority
JP
Japan
Prior art keywords
frequency
comparator
capture range
signal
shear
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
JP62205015A
Other languages
Japanese (ja)
Other versions
JPH0719440B2 (en
Inventor
Haruyuki Inohana
Shunichiro Sakamoto
Hideaki Takada
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.)
Hitachi Ltd
Pioneer Corp
Original Assignee
Hitachi Ltd
Pioneer Electronic 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 Hitachi Ltd, Pioneer Electronic Corp filed Critical Hitachi Ltd
Priority to JP62205015A priority Critical patent/JPH0719440B2/en
Publication of JPS6449176A publication Critical patent/JPS6449176A/en
Publication of JPH0719440B2 publication Critical patent/JPH0719440B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
    • H03L7/087—Details 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

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To expand a capture range by controlling a voltage control oscillator also by the output of a frequency comparator in addition to the output of a phase comparator. CONSTITUTION:When a frequency difference between an 8/10 signal inputted from a terminal 1 as a reference input and a demodulating clock as a variable input is stored in the 1st capture range, a phase comparator 3 compares both the inputs and outputs an error signal having size and polarity corresponding to the shear, quantity and directions of the phases. When said frequency difference is stored in the 2nd capture range wider than the 1st range, a frequency comparator 4 compares both the values and outputs the shear or the like of frequency as a signal. High frequency components are respectively removed from signals obtained from comparators 3, 4 by the 1st and 2nd LPFs 5, 6, inputted to an adder 7, controlled by the oscillation frequency of a voltage control oscillator 8 and outputted from a terminal 2 as a demodulated clock.
JP62205015A 1987-08-20 1987-08-20 PLL circuit Expired - Lifetime JPH0719440B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62205015A JPH0719440B2 (en) 1987-08-20 1987-08-20 PLL circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62205015A JPH0719440B2 (en) 1987-08-20 1987-08-20 PLL circuit

Publications (2)

Publication Number Publication Date
JPS6449176A true JPS6449176A (en) 1989-02-23
JPH0719440B2 JPH0719440B2 (en) 1995-03-06

Family

ID=16500033

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62205015A Expired - Lifetime JPH0719440B2 (en) 1987-08-20 1987-08-20 PLL circuit

Country Status (1)

Country Link
JP (1) JPH0719440B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH042217A (en) * 1990-04-19 1992-01-07 Nec Corp Pll frequency synthesizer
JPH06268516A (en) * 1993-03-12 1994-09-22 Nec Corp Method for clock subordinate synchronization
US6496555B1 (en) 1998-07-22 2002-12-17 Nec Corporation Phase locked loop

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH042217A (en) * 1990-04-19 1992-01-07 Nec Corp Pll frequency synthesizer
JPH06268516A (en) * 1993-03-12 1994-09-22 Nec Corp Method for clock subordinate synchronization
US6496555B1 (en) 1998-07-22 2002-12-17 Nec Corporation Phase locked loop

Also Published As

Publication number Publication date
JPH0719440B2 (en) 1995-03-06

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