JPS57194637A - Phase locked loop lock detecting circuit - Google Patents

Phase locked loop lock detecting circuit

Info

Publication number
JPS57194637A
JPS57194637A JP56079215A JP7921581A JPS57194637A JP S57194637 A JPS57194637 A JP S57194637A JP 56079215 A JP56079215 A JP 56079215A JP 7921581 A JP7921581 A JP 7921581A JP S57194637 A JPS57194637 A JP S57194637A
Authority
JP
Japan
Prior art keywords
output
detecting circuit
input
phase detecting
pulse
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
JP56079215A
Other languages
Japanese (ja)
Other versions
JPH0693628B2 (en
Inventor
Masami Kawamura
Toshito Habuka
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
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56079215A priority Critical patent/JPH0693628B2/en
Publication of JPS57194637A publication Critical patent/JPS57194637A/en
Publication of JPH0693628B2 publication Critical patent/JPH0693628B2/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

Landscapes

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

Abstract

PURPOSE:To obtain a PLL lock detecting signal from a detecting circuit, by providing a circuit for detecting that an output pulse of a phase detecting circuit is in a continuous locked state in a pulse train sampled by a prescribed timing signal. CONSTITUTION:A programmable counter 2 applies a 1/N frequency-divided output to an input terminal D of a D-type flip-flop (FF) 3. From an output Q of the DFF 3, an inverted Fi which has pulse width corresponding to one period of an input signal FIN and has been frequency-divided into 1/N is formed, is used as an N-value preset gate pulse, also is inverted by an inverter INV, and is applied to one input Fi of a phase detecting circuit 1. To the other input of the phase detecting circuit 1, reference frequency REF is applied, and its outputs PD1, PD2 are applied to the gates of an n-MISFETQ2 and a p-MISFETQ1, respectively. A phase detecting output obtained in output circuits of Q2 and Q1 is converted to DC voltage by a filter 6, is sent to a VCO 7, and an output of the VCO 7 becomes a local oscillating signal together with the FIN.
JP56079215A 1981-05-27 1981-05-27 PLL lock detection circuit Expired - Lifetime JPH0693628B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56079215A JPH0693628B2 (en) 1981-05-27 1981-05-27 PLL lock detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56079215A JPH0693628B2 (en) 1981-05-27 1981-05-27 PLL lock detection circuit

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP3200256A Division JPH0736522B2 (en) 1991-08-09 1991-08-09 PLL lock detection circuit

Publications (2)

Publication Number Publication Date
JPS57194637A true JPS57194637A (en) 1982-11-30
JPH0693628B2 JPH0693628B2 (en) 1994-11-16

Family

ID=13683703

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56079215A Expired - Lifetime JPH0693628B2 (en) 1981-05-27 1981-05-27 PLL lock detection circuit

Country Status (1)

Country Link
JP (1) JPH0693628B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6047515A (en) * 1983-08-26 1985-03-14 Victor Co Of Japan Ltd Pull in-decision circuit
JPS6382128A (en) * 1986-09-26 1988-04-12 Nec Corp Phase locked loop circuit
JPH05243988A (en) * 1991-10-04 1993-09-21 Alcatel Cit Synchronization detection device for digital phase locked loop
KR100435556B1 (en) * 1997-12-31 2004-10-14 서창전기통신 주식회사 Power apply device of an rf-module, specially related to increasing usage time of a battery by controlling power applied to the rf-module
WO2004107750A1 (en) * 2003-05-28 2004-12-09 Matsushita Electric Industrial Co., Ltd. Digital interface receiver apparatus
CN113225072A (en) * 2021-05-19 2021-08-06 西安博瑞集信电子科技有限公司 Over-sampling algorithm-based lock detection circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56104542A (en) * 1980-01-10 1981-08-20 Sperry Rand Corp Synchronization steppout state detector circuit for digital phase synchronization loop

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56104542A (en) * 1980-01-10 1981-08-20 Sperry Rand Corp Synchronization steppout state detector circuit for digital phase synchronization loop

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6047515A (en) * 1983-08-26 1985-03-14 Victor Co Of Japan Ltd Pull in-decision circuit
JPS6382128A (en) * 1986-09-26 1988-04-12 Nec Corp Phase locked loop circuit
JPH05243988A (en) * 1991-10-04 1993-09-21 Alcatel Cit Synchronization detection device for digital phase locked loop
KR100435556B1 (en) * 1997-12-31 2004-10-14 서창전기통신 주식회사 Power apply device of an rf-module, specially related to increasing usage time of a battery by controlling power applied to the rf-module
WO2004107750A1 (en) * 2003-05-28 2004-12-09 Matsushita Electric Industrial Co., Ltd. Digital interface receiver apparatus
CN100444629C (en) * 2003-05-28 2008-12-17 松下电器产业株式会社 Digital interface receiver apparatus
US7826562B2 (en) 2003-05-28 2010-11-02 Panasonic Corporation Digital interface receiver apparatus
CN113225072A (en) * 2021-05-19 2021-08-06 西安博瑞集信电子科技有限公司 Over-sampling algorithm-based lock detection circuit
CN113225072B (en) * 2021-05-19 2022-10-04 西安博瑞集信电子科技有限公司 Over-sampling algorithm-based lock detection circuit

Also Published As

Publication number Publication date
JPH0693628B2 (en) 1994-11-16

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