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ATE205028T1 - Verfahren und schaltung zur aufrechterhaltung des synchronisierten zustandes in einem digitalen phasenregelkreis - Google Patents

Verfahren und schaltung zur aufrechterhaltung des synchronisierten zustandes in einem digitalen phasenregelkreis

Info

Publication number
ATE205028T1
ATE205028T1 AT96934618T AT96934618T ATE205028T1 AT E205028 T1 ATE205028 T1 AT E205028T1 AT 96934618 T AT96934618 T AT 96934618T AT 96934618 T AT96934618 T AT 96934618T AT E205028 T1 ATE205028 T1 AT E205028T1
Authority
AT
Austria
Prior art keywords
signal
circuit
pll
maintaining
control loop
Prior art date
Application number
AT96934618T
Other languages
English (en)
Inventor
Maurizio Viti
Original Assignee
Siemens Inf & Comm Networks
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 Siemens Inf & Comm Networks filed Critical Siemens Inf & Comm Networks
Application granted granted Critical
Publication of ATE205028T1 publication Critical patent/ATE205028T1/de

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
    • H03L7/14—Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail or are interrupted
    • H03L7/143—Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail or are interrupted by switching the reference signal of the phase-locked loop
    • H03L7/145—Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail or are interrupted by switching the reference signal of the phase-locked loop the switched reference signal being derived from the controlled oscillator output signal

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
AT96934618T 1995-12-20 1996-10-10 Verfahren und schaltung zur aufrechterhaltung des synchronisierten zustandes in einem digitalen phasenregelkreis ATE205028T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT95MI002679A IT1278538B1 (it) 1995-12-20 1995-12-20 Procedimento per il mantenimento dell'aggancio in un pll digitale durante eventuali interruzioni transitorie del segnale sincronizzante
PCT/EP1996/004405 WO1997023049A1 (en) 1995-12-20 1996-10-10 Procedure and circuit for holding lock state in a digital pll

Publications (1)

Publication Number Publication Date
ATE205028T1 true ATE205028T1 (de) 2001-09-15

Family

ID=11372753

Family Applications (1)

Application Number Title Priority Date Filing Date
AT96934618T ATE205028T1 (de) 1995-12-20 1996-10-10 Verfahren und schaltung zur aufrechterhaltung des synchronisierten zustandes in einem digitalen phasenregelkreis

Country Status (5)

Country Link
EP (1) EP0868783B1 (de)
AT (1) ATE205028T1 (de)
DE (1) DE69614875T2 (de)
IT (1) IT1278538B1 (de)
WO (1) WO1997023049A1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH566089A5 (de) * 1973-12-20 1975-08-29 Hasler Ag
JPS57140034A (en) * 1981-02-24 1982-08-30 Nec Corp Phase synchronizing oscillator
DE3302700A1 (de) * 1983-01-27 1984-08-02 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zum einstellen der mittenfrequenz des oszillators eines phasenregelkreises
DE69127333T2 (de) * 1990-10-02 1998-01-02 Nippon Electric Co Phasensynchronisiertes Oszillatorsystem mit Ma nahmen gegen Unterbrechung des Eingangstakts

Also Published As

Publication number Publication date
EP0868783A1 (de) 1998-10-07
ITMI952679A1 (it) 1997-06-20
DE69614875T2 (de) 2002-04-11
WO1997023049A1 (en) 1997-06-26
IT1278538B1 (it) 1997-11-24
DE69614875D1 (de) 2001-10-04
EP0868783B1 (de) 2001-08-29
ITMI952679A0 (de) 1995-12-20

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Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties