IT1251706B - Procedimento per ampliare la banda di risposta in frequenza di un oscillatore a cristallo controllato in tensione e relativo circuito. - Google Patents

Procedimento per ampliare la banda di risposta in frequenza di un oscillatore a cristallo controllato in tensione e relativo circuito.

Info

Publication number
IT1251706B
IT1251706B ITMI912669A ITMI912669A IT1251706B IT 1251706 B IT1251706 B IT 1251706B IT MI912669 A ITMI912669 A IT MI912669A IT MI912669 A ITMI912669 A IT MI912669A IT 1251706 B IT1251706 B IT 1251706B
Authority
IT
Italy
Prior art keywords
vcxo
frequency response
signal
expanding
crystal oscillator
Prior art date
Application number
ITMI912669A
Other languages
English (en)
Inventor
Mauro Casanova
Luca Ferrucci
Original Assignee
Sits Soc It Telecom Siemens
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 Sits Soc It Telecom Siemens filed Critical Sits Soc It Telecom Siemens
Priority to ITMI912669A priority Critical patent/IT1251706B/it
Publication of ITMI912669A0 publication Critical patent/ITMI912669A0/it
Priority to DE69209605T priority patent/DE69209605T2/de
Priority to ES92116928T priority patent/ES2084903T3/es
Priority to EP92116928A priority patent/EP0536660B1/en
Publication of ITMI912669A1 publication Critical patent/ITMI912669A1/it
Application granted granted Critical
Publication of IT1251706B publication Critical patent/IT1251706B/it
Priority to GR960401468T priority patent/GR3020102T3/el

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
    • H03L7/081—Details of the phase-locked loop provided with an additional controlled phase shifter
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/06—Means for changing frequency deviation

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Optical Communication System (AREA)

Abstract

Viene descritto un procedimento per ampliare la banda di risposta in frequenza di un oscillatore a cristallo controllato in tensione (VCXO) da inserire in un anello ad aggancio di fase (PLL), usato per il recupero del segnate di orologio da una stringa di dati transitanti su fibra ottica. IL procedimento consiste principalmente nel filtrare in modo passa-basso il segnale di comando del VCXO e nell'utilizzare il segnale filtrato per comandare il VCXO e un modulatore di fase a cui perviene il segnale generato dal VCXO. La frequenza di taglio del filtro e i guadagni del VCXO e del modulatore hanno valori tali per cui il segnale in uscita dal modulatore risulta costituito prevalentemente dal solo segnale generato dal VCXO, fino a quando la risposta in frequenza di quest'ultimo si mantiene costante, e dal segnale generato dal VCXO modulato di fase, altrimenti. Viene inoltre descritto il circuito che realizza il procedimento di cui sopra (Fig. 3).
ITMI912669A 1991-10-08 1991-10-08 Procedimento per ampliare la banda di risposta in frequenza di un oscillatore a cristallo controllato in tensione e relativo circuito. IT1251706B (it)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ITMI912669A IT1251706B (it) 1991-10-08 1991-10-08 Procedimento per ampliare la banda di risposta in frequenza di un oscillatore a cristallo controllato in tensione e relativo circuito.
DE69209605T DE69209605T2 (de) 1991-10-08 1992-10-02 Verfahren zur Erweiterung der Durchlassfrequenzbandbreite eines spannungsgesteuerten Kristalloszillators und mitverbundene Schaltung
ES92116928T ES2084903T3 (es) 1991-10-08 1992-10-02 Proceso para el ensanchamiento de la banda de respuesta de frecuencia de un oscilador de cristal controlado con tension y circuito asociado.
EP92116928A EP0536660B1 (en) 1991-10-08 1992-10-02 Process for broadening the frequency response band of a voltage-controlled crystal oscillator and associated circuit
GR960401468T GR3020102T3 (en) 1991-10-08 1996-05-30 Process for broadening the frequency response band of a voltage-controlled crystal oscillator and associated circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI912669A IT1251706B (it) 1991-10-08 1991-10-08 Procedimento per ampliare la banda di risposta in frequenza di un oscillatore a cristallo controllato in tensione e relativo circuito.

Publications (3)

Publication Number Publication Date
ITMI912669A0 ITMI912669A0 (it) 1991-10-08
ITMI912669A1 ITMI912669A1 (it) 1993-04-08
IT1251706B true IT1251706B (it) 1995-05-19

Family

ID=11360833

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI912669A IT1251706B (it) 1991-10-08 1991-10-08 Procedimento per ampliare la banda di risposta in frequenza di un oscillatore a cristallo controllato in tensione e relativo circuito.

Country Status (5)

Country Link
EP (1) EP0536660B1 (it)
DE (1) DE69209605T2 (it)
ES (1) ES2084903T3 (it)
GR (1) GR3020102T3 (it)
IT (1) IT1251706B (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5341110A (en) * 1993-07-14 1994-08-23 Watkins-Johnson Company Low phase noise reference oscillator
JPH07162299A (ja) * 1993-10-13 1995-06-23 Mitsubishi Electric Corp 位相ロックドループ装置、発振器及び信号処理装置
DE19953578A1 (de) 1999-11-08 2001-05-23 Mikron Ag Fuer Integrierte Mik Vorrichtung und Verfahren zur Erzeugung eines Taktsignals
CN108631774B (zh) * 2017-03-22 2021-07-13 中芯国际集成电路制造(上海)有限公司 锁相环及其启动电路、启动方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE521646A (it) * 1952-07-25
US4009450A (en) * 1975-04-14 1977-02-22 Motorola, Inc. Phase locked loop tracking filter having enhanced attenuation of unwanted signals
US4023115A (en) * 1975-07-31 1977-05-10 Societe Nationale D'etude Et De Construction De Moteurs D'aviation Means for controlling the phase or frequency output of an oscillator in a loop circuit

Also Published As

Publication number Publication date
ITMI912669A1 (it) 1993-04-08
EP0536660B1 (en) 1996-04-03
DE69209605T2 (de) 1996-09-26
EP0536660A1 (en) 1993-04-14
ITMI912669A0 (it) 1991-10-08
DE69209605D1 (de) 1996-05-09
ES2084903T3 (es) 1996-05-16
GR3020102T3 (en) 1996-08-31

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Legal Events

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0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19951002