IT948767B - SERVING CIRCUIT VARIABLE FREQUENCY GENERATOR - Google Patents

SERVING CIRCUIT VARIABLE FREQUENCY GENERATOR

Info

Publication number
IT948767B
IT948767B IT4863272A IT4863272A IT948767B IT 948767 B IT948767 B IT 948767B IT 4863272 A IT4863272 A IT 4863272A IT 4863272 A IT4863272 A IT 4863272A IT 948767 B IT948767 B IT 948767B
Authority
IT
Italy
Prior art keywords
variable frequency
frequency generator
circuit variable
serving circuit
serving
Prior art date
Application number
IT4863272A
Other languages
Italian (it)
Original Assignee
Thomson Csf
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 Thomson Csf filed Critical Thomson Csf
Application granted granted Critical
Publication of IT948767B publication Critical patent/IT948767B/en

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
    • H03L7/16—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
    • H03L7/1972—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 for reducing the locking time interval
IT4863272A 1971-03-02 1972-02-29 SERVING CIRCUIT VARIABLE FREQUENCY GENERATOR IT948767B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7107133A FR2128056B1 (en) 1971-03-02 1971-03-02

Publications (1)

Publication Number Publication Date
IT948767B true IT948767B (en) 1973-06-11

Family

ID=9072749

Family Applications (1)

Application Number Title Priority Date Filing Date
IT4863272A IT948767B (en) 1971-03-02 1972-02-29 SERVING CIRCUIT VARIABLE FREQUENCY GENERATOR

Country Status (9)

Country Link
BE (1) BE780113A (en)
DE (1) DE2209385C2 (en)
ES (1) ES400258A1 (en)
FR (1) FR2128056B1 (en)
GB (1) GB1333534A (en)
IT (1) IT948767B (en)
NL (1) NL7202601A (en)
NO (1) NO133052C (en)
SE (1) SE369651B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1290407C (en) * 1986-12-23 1991-10-08 Shigeki Saito Frequency synthesizer
DE3939709A1 (en) * 1989-12-01 1991-06-06 Bosch Gmbh Robert METHOD FOR TUNING A RADIO TRANSMITTER AND / OR RECEIVER
JPH03224322A (en) * 1990-01-29 1991-10-03 Toshiba Corp Channel selection circuit
DE4017491C2 (en) * 1990-05-31 2002-05-08 Siemens Ag tuning
JP3033654B2 (en) * 1993-08-23 2000-04-17 日本電気株式会社 PLL frequency synthesizer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1067454A (en) * 1963-06-21 1967-05-03 Plessey Uk Ltd Improvements in or relating to controlled frequency electrical oscillation generators
US3588732A (en) * 1969-01-16 1971-06-28 Collins Radio Co Frequency synthesizer

Also Published As

Publication number Publication date
FR2128056A1 (en) 1972-10-20
GB1333534A (en) 1973-10-10
NL7202601A (en) 1972-09-05
NO133052C (en) 1976-02-25
DE2209385C2 (en) 1981-12-03
DE2209385A1 (en) 1972-09-07
SE369651B (en) 1974-09-09
NO133052B (en) 1975-11-17
FR2128056B1 (en) 1974-04-26
BE780113A (en) 1972-07-03
ES400258A1 (en) 1975-01-01

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