BR9807549A - Oscilador a cristal programável - Google Patents

Oscilador a cristal programável

Info

Publication number
BR9807549A
BR9807549A BR9807549-7A BR9807549A BR9807549A BR 9807549 A BR9807549 A BR 9807549A BR 9807549 A BR9807549 A BR 9807549A BR 9807549 A BR9807549 A BR 9807549A
Authority
BR
Brazil
Prior art keywords
frequency
crystal
output frequency
crystal oscillator
parameters
Prior art date
Application number
BR9807549-7A
Other languages
English (en)
Inventor
John W Fallisgaard
Eugene S Trefethen
Original Assignee
Fox Enterprises Inc
Jet City Eletronics
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 Fox Enterprises Inc, Jet City Eletronics filed Critical Fox Enterprises Inc
Publication of BR9807549A publication Critical patent/BR9807549A/pt

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
    • H03B5/36—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device
    • 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
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B19/00—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
    • H03B5/36—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device
    • H03B5/366—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device and comprising means for varying the frequency by a variable voltage or current
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
    • H03B2201/02—Varying the frequency of the oscillations by electronic means
    • H03B2201/025—Varying the frequency of the oscillations by electronic means the means being an electronic switch for switching in or out oscillator elements
    • H03B2201/0266—Varying the frequency of the oscillations by electronic means the means being an electronic switch for switching in or out oscillator elements the means comprising a transistor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J2200/00—Indexing scheme relating to tuning resonant circuits and selecting resonant circuits
    • H03J2200/10—Tuning of a resonator by means of digitally controlled capacitor bank
    • 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
    • H03L7/089—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector generating up-down pulses
    • H03L7/0891—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector generating up-down pulses the up-down pulses controlling source and sink current generators, e.g. a charge pump
    • H03L7/0895—Details of the current generators
    • H03L7/0898—Details of the current generators the source or sink current values being variable

Landscapes

  • Oscillators With Electromechanical Resonators (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

Patente de Invenção: <B>" OSCILADOR A CRISTAL PROGRAMáVEL"<D>. Oscilador a cristal progamável que apresenta uma memória para armazenar os parâmentros de definição de freq³ência. Tipicamente, um destes parâmetros é usado para programar um circuito de carga capacitiva ajustável acoplado a um cristal, para assim ajustar a freq³ência de fonte do cristal. parâmetros adicionais são usados para programar a freq³ência de saída de um circuito em anel travado por fase acoplado para receber a freq³ência de fonte ajustada. Um parâmetro adicional pode também ser usado para dividir a freq³ência de saída do circuito em anel travado por fase para supir uma freq³ência de saída especificada. Os osciladores podem ser fabricados como osciladores a cristal programáveis genéricos com relação à freq³ência de saída e depois rapidamente programados para produzirem freq³ência de saída especificadas pelo cliente com um alto grau de precisão.
BR9807549-7A 1997-02-05 1998-02-03 Oscilador a cristal programável BR9807549A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/795,978 US5952890A (en) 1997-02-05 1997-02-05 Crystal oscillator programmable with frequency-defining parameters
PCT/US1998/001796 WO1998034338A1 (en) 1997-02-05 1998-02-03 Programmable crystal oscillator

Publications (1)

Publication Number Publication Date
BR9807549A true BR9807549A (pt) 2000-02-15

Family

ID=25166934

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9807549-7A BR9807549A (pt) 1997-02-05 1998-02-03 Oscilador a cristal programável

Country Status (15)

Country Link
US (4) US5952890A (pt)
EP (1) EP0958652B1 (pt)
JP (1) JP2001510657A (pt)
KR (1) KR20000070691A (pt)
CN (1) CN1191672C (pt)
AR (1) AR011624A1 (pt)
AU (1) AU6050698A (pt)
BR (1) BR9807549A (pt)
CA (1) CA2278583A1 (pt)
DE (1) DE69826244T2 (pt)
HK (1) HK1026079A1 (pt)
MY (1) MY118540A (pt)
TW (1) TW404095B (pt)
WO (1) WO1998034338A1 (pt)
ZA (1) ZA98866B (pt)

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HK1026079A1 (en) 2000-12-01
EP0958652A1 (en) 1999-11-24
DE69826244D1 (de) 2004-10-21
ZA98866B (en) 1998-08-05
WO1998034338A1 (en) 1998-08-06
US20030122630A1 (en) 2003-07-03
JP2001510657A (ja) 2001-07-31
MY118540A (en) 2004-12-31
US5952890A (en) 1999-09-14
DE69826244T2 (de) 2005-11-17
CA2278583A1 (en) 1998-08-06
AR011624A1 (es) 2000-08-30
TW404095B (en) 2000-09-01
US20010017573A1 (en) 2001-08-30
EP0958652B1 (en) 2004-09-15
US6188290B1 (en) 2001-02-13
US6664860B2 (en) 2003-12-16
CN1191672C (zh) 2005-03-02
KR20000070691A (ko) 2000-11-25
US6954113B2 (en) 2005-10-11
AU6050698A (en) 1998-08-25

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