BR9810828A - Transmissor de rádio de modulação de frequência, e, processo de controle de desvio para um transmissor de rádio de modulação de frequência - Google Patents

Transmissor de rádio de modulação de frequência, e, processo de controle de desvio para um transmissor de rádio de modulação de frequência

Info

Publication number
BR9810828A
BR9810828A BR9810828-0A BR9810828A BR9810828A BR 9810828 A BR9810828 A BR 9810828A BR 9810828 A BR9810828 A BR 9810828A BR 9810828 A BR9810828 A BR 9810828A
Authority
BR
Brazil
Prior art keywords
radio transmitter
frequency modulation
frequency
modulation radio
input
Prior art date
Application number
BR9810828-0A
Other languages
English (en)
Inventor
Paul Wilkinson Dent
Original Assignee
Ericsson Inc
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 Ericsson Inc filed Critical Ericsson Inc
Publication of BR9810828A publication Critical patent/BR9810828A/pt

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • H03C3/0908—Modifications of modulator for regulating the mean frequency using a phase locked loop
    • H03C3/0966—Modifications of modulator for regulating the mean frequency using a phase locked loop modulating the reference clock
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • H03C3/0908—Modifications of modulator for regulating the mean frequency using a phase locked loop
    • H03C3/0916—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop
    • H03C3/0925—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop applying frequency modulation at the divider in the feedback loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • H03C3/0908—Modifications of modulator for regulating the mean frequency using a phase locked loop
    • H03C3/0916—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop
    • H03C3/0933—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop using fractional frequency division in the feedback loop of the phase locked loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • H03C3/0908—Modifications of modulator for regulating the mean frequency using a phase locked loop
    • H03C3/0941—Modifications of modulator for regulating the mean frequency using a phase locked loop applying frequency modulation at more than one point in the loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • H03C3/0908—Modifications of modulator for regulating the mean frequency using a phase locked loop
    • H03C3/095—Modifications of modulator for regulating the mean frequency using a phase locked loop applying frequency modulation to the loop in front of the voltage controlled oscillator
    • 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
    • H03L7/187—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 using means for coarse tuning the voltage controlled oscillator of the loop
    • H03L7/189—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 using means for coarse tuning the voltage controlled oscillator of the loop comprising a D/A converter for generating a coarse tuning voltage
    • 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
    • H03L7/197—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 numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division

Landscapes

  • Transmitters (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

"TRANSMISSOR DE RáDIO DE MODULAçãO DE FREQuêNCIA, E, PROCESSO DE CONTROLE DE DESVIO PARA UM TRANSMISSOR DE RáDIO DE MODULAçãO DE FREQuêNCIA". Um transmissor de rádio de modulação de freq³ência (FM), tal como um telefone celular, inclui um sistema de controle de desvio automático para compensar automaticamente a sensibilidade variável do transmissor FM. O transmissor FM inclui um circuito de travamento de fase incluindo um oscilador controlado que produz um sinal de entrada modulado por freq³ência em uma freq³ência de canal de saída em resposta a uma entrada de controle que é aplicada ao mesmo. Um escalonador responde ao sinal de entrada e pelo menos a um conteúdo de escalonamento, para escalonar o sinal de entrada com base pelo menos em uma constante de escalonamento e para fornecer o sinal de entrada escalonado para o circuito de travamento de fase para produzir o sinal de entrada modulado por freq³ência na freq³ência de canal. Um sistema de controle de desvio automático mede o sinal de controle que é aplicado ao oscilador controlado quando sintonizado em uma dentre a pluralidade de freq³ências de canal de saída e atualiza pelo menos uma das constantes de escalonamento com base na entrada de controle medida, para dessa forma fornecer um controle de desvio automático.
BR9810828-0A 1997-07-31 1998-07-29 Transmissor de rádio de modulação de frequência, e, processo de controle de desvio para um transmissor de rádio de modulação de frequência BR9810828A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/904,131 US5983077A (en) 1997-07-31 1997-07-31 Systems and methods for automatic deviation setting and control in radio transmitters
PCT/US1998/015665 WO1999007065A1 (en) 1997-07-31 1998-07-29 Systems and methods for automatic deviation setting and control in radio transmitters

Publications (1)

Publication Number Publication Date
BR9810828A true BR9810828A (pt) 2000-07-25

Family

ID=25418618

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9810828-0A BR9810828A (pt) 1997-07-31 1998-07-29 Transmissor de rádio de modulação de frequência, e, processo de controle de desvio para um transmissor de rádio de modulação de frequência

Country Status (9)

Country Link
US (1) US5983077A (pt)
EP (1) EP1000461B1 (pt)
JP (1) JP2001512912A (pt)
CN (1) CN1265785A (pt)
AU (1) AU8599098A (pt)
BR (1) BR9810828A (pt)
CA (1) CA2296309A1 (pt)
DE (1) DE69811084T2 (pt)
WO (1) WO1999007065A1 (pt)

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Also Published As

Publication number Publication date
DE69811084T2 (de) 2003-07-17
CA2296309A1 (en) 1999-02-11
AU8599098A (en) 1999-02-22
CN1265785A (zh) 2000-09-06
US5983077A (en) 1999-11-09
WO1999007065A1 (en) 1999-02-11
EP1000461A1 (en) 2000-05-17
JP2001512912A (ja) 2001-08-28
EP1000461B1 (en) 2003-01-29
DE69811084D1 (de) 2003-03-06

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B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

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