CA1078472A - Phase-locked loop with switchable loop filter - Google Patents

Phase-locked loop with switchable loop filter

Info

Publication number
CA1078472A
CA1078472A CA285,193A CA285193A CA1078472A CA 1078472 A CA1078472 A CA 1078472A CA 285193 A CA285193 A CA 285193A CA 1078472 A CA1078472 A CA 1078472A
Authority
CA
Canada
Prior art keywords
signal
loop filter
phase
loop
oscillator
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.)
Expired
Application number
CA285,193A
Other languages
English (en)
French (fr)
Inventor
Wilfried R. De Coninck
Jean L. E. R. Goret
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of CA1078472A publication Critical patent/CA1078472A/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
    • H03L7/08—Details of the phase-locked loop
    • H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
    • H03L7/107—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth
    • H03L7/1075—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth by changing characteristics of the loop filter, e.g. changing the gain, changing the bandwidth

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
CA285,193A 1976-08-20 1977-08-22 Phase-locked loop with switchable loop filter Expired CA1078472A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NLAANVRAGE7609251,A NL174417C (nl) 1976-08-20 1976-08-20 Fasevergrendellus met omschakelbaar lusfilter.

Publications (1)

Publication Number Publication Date
CA1078472A true CA1078472A (en) 1980-05-27

Family

ID=19826766

Family Applications (1)

Application Number Title Priority Date Filing Date
CA285,193A Expired CA1078472A (en) 1976-08-20 1977-08-22 Phase-locked loop with switchable loop filter

Country Status (10)

Country Link
US (1) US4117420A (enExample)
JP (1) JPS5326558A (enExample)
AU (1) AU510605B2 (enExample)
CA (1) CA1078472A (enExample)
DE (1) DE2735642C2 (enExample)
FR (1) FR2362528A1 (enExample)
GB (1) GB1533544A (enExample)
IT (1) IT1084170B (enExample)
NL (1) NL174417C (enExample)
SE (1) SE413450B (enExample)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4231071A (en) * 1978-07-17 1980-10-28 Digital Equipment Corporation Reader for data recorded on magnetic disks at plural densities
US4330758A (en) * 1980-02-20 1982-05-18 Motorola, Inc. Synchronized frequency synthesizer with high speed lock
US4365210A (en) * 1980-06-26 1982-12-21 Motorola, Inc. Data and clock recovery system having a phase-locked-loop and which controls dynamic loop response of a data stream of unknown data format
US4365211A (en) * 1980-10-31 1982-12-21 Westinghouse Electric Corp. Phase-locked loop with initialization loop
US4477919A (en) * 1981-04-06 1984-10-16 Motorola, Inc. Range control circuit for counter to be used in a frequency synthesizer
US4472820A (en) * 1981-04-06 1984-09-18 Motorola, Inc. Program swallow counting device using a single synchronous counter for frequency synthesizing
US4377871A (en) * 1981-04-06 1983-03-22 Motorola, Inc. Transmit security system for a synthesized transceiver
US4443769A (en) * 1981-04-27 1984-04-17 Rca Corporation Frequency search system for a phase locked loop
US4506233A (en) * 1982-06-28 1985-03-19 General Electric Company Bandwidth control circuit for a phase locked loop
JPS5924039A (ja) * 1982-07-29 1984-02-07 協和産業株式会社 下水管または排水管内の洗滌をする方法
US4567448A (en) * 1982-08-05 1986-01-28 Epson Corporation Variable frequency oscillator
USRE34317E (en) * 1982-08-05 1993-07-20 Seiko Epson Corporation Variable frequency oscillator
US4559505A (en) * 1983-01-04 1985-12-17 Motorola, Inc. Frequency synthesizer with improved priority channel switching
JPS61159468U (enExample) * 1985-03-22 1986-10-02
DE3620614A1 (de) * 1986-06-20 1987-12-23 Gutehoffnungshuette Man Verfahren zum filtern eines verrauschten signals
DE3725107A1 (de) * 1987-07-29 1989-02-16 Messerschmitt Boelkow Blohm Adaptives, nichtlineares frequenzbereichsfilter mit geringem phasenverlust
US5175729A (en) * 1991-06-05 1992-12-29 Motorola, Inc. Radio with fast lock phase-locked loop
US5268655A (en) * 1992-05-27 1993-12-07 Codex Corporation Device and method for automatically adjusting a phase-locked loop
WO1997050187A1 (en) * 1996-06-27 1997-12-31 Philips Electronics N.V. Satellite receiver

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB951230A (en) * 1961-10-04 1964-03-04 Ferguson Radio Corp Improvements in and relating to frequency control systems
US3287657A (en) * 1963-04-09 1966-11-22 Ericsson Telefon Ab L M Phase controlled oscillator with a variable synchronizing range
DE1762025B1 (de) * 1968-03-23 1970-06-18 Fernseh Gmbh Schaltungsanordnung mit erweitertem Synchronisierbereich zur Synchronisierung eines Oszillators mit einer Wechselspannung
US3626426A (en) * 1970-01-29 1971-12-07 Trw Inc Phased locked loops
US3660781A (en) * 1970-10-19 1972-05-02 Bendix Corp Low power frequency synthesizer with two phase locking loops
US3694776A (en) * 1970-12-14 1972-09-26 Motorola Inc Adaptive filter wherein opposite conductivity transistors are operative in response to signals in excess of predetermined amplitude
US3906375A (en) * 1974-02-08 1975-09-16 Rockwell International Corp Constant gain switching amplifier apparatus
US3909735A (en) * 1974-04-04 1975-09-30 Ncr Co Slow switch for bandwidth change in phase-locked loop
US3993958A (en) * 1975-08-20 1976-11-23 Rca Corporation Fast acquisition circuit for a phase locked loop

Also Published As

Publication number Publication date
AU510605B2 (en) 1980-07-03
JPS5326558A (en) 1978-03-11
DE2735642A1 (de) 1978-02-23
GB1533544A (en) 1978-11-29
DE2735642C2 (de) 1982-05-19
IT1084170B (it) 1985-05-25
JPS5751775B2 (enExample) 1982-11-04
AU2831477A (en) 1979-03-08
SE7709246L (sv) 1978-02-21
SE413450B (sv) 1980-05-27
FR2362528B1 (enExample) 1980-07-18
NL174417C (nl) 1984-06-01
NL174417B (nl) 1984-01-02
FR2362528A1 (fr) 1978-03-17
NL7609251A (nl) 1978-02-22
US4117420A (en) 1978-09-26

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Legal Events

Date Code Title Description
MKEX Expiry