GB1413608A - Phase-controlled oscillator circuit - Google Patents

Phase-controlled oscillator circuit

Info

Publication number
GB1413608A
GB1413608A GB4243773A GB4243773A GB1413608A GB 1413608 A GB1413608 A GB 1413608A GB 4243773 A GB4243773 A GB 4243773A GB 4243773 A GB4243773 A GB 4243773A GB 1413608 A GB1413608 A GB 1413608A
Authority
GB
United Kingdom
Prior art keywords
sept
oscillator
converter
comparing
outputs
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB4243773A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KOEPENICK FUNKWERK VEB
Original Assignee
KOEPENICK FUNKWERK VEB
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 KOEPENICK FUNKWERK VEB filed Critical KOEPENICK FUNKWERK VEB
Publication of GB1413608A publication Critical patent/GB1413608A/en
Expired legal-status Critical Current

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
    • H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
    • H03L7/113—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using frequency discriminator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations
    • H03D13/003—Circuits for comparing the phase or frequency of two mutually-independent oscillations in which both oscillations are converted by logic means into pulses which are applied to filtering or integrating means
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

1413608 Automatic frequency control, frequency discriminators FUNKWERK KOPENICK VEB 10 Sept 1973 [21 Sept 1972] 42437/73 Heading H3A In an a.p.c. circuit, the oscillator 1 is controlled by a first error signal derived by comparing the divided down output of the oscillator and a reference signal f1 in a phase comparator 3 and by a second error signal derived by comparing the two signals in a digital frequency comparator 4 having its output coupled to a D/A converter 6. The frequency comparator, Fig. 2, comprises respective divide-by-two stages A1, A2 for each of the two signals to be compared, the outputs from which are applied to bistables B1, B2. The outputs from the bi-stables are coupled to a NAND gate 7. When the two frequencies are the same, one bi-stable remains "set" and the other "reset" and when they differ, a variable pulse width signal (Fig. 6, not shown) is produced which is converted to a varying voltage by the D/A converter.
GB4243773A 1972-09-21 1973-09-10 Phase-controlled oscillator circuit Expired GB1413608A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD16578172A DD100596A1 (en) 1972-09-21 1972-09-21

Publications (1)

Publication Number Publication Date
GB1413608A true GB1413608A (en) 1975-11-12

Family

ID=5488266

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4243773A Expired GB1413608A (en) 1972-09-21 1973-09-10 Phase-controlled oscillator circuit

Country Status (4)

Country Link
DD (1) DD100596A1 (en)
DE (1) DE2334716A1 (en)
FR (1) FR2200678B1 (en)
GB (1) GB1413608A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157904A (en) * 1984-03-30 1985-10-30 Victor Company Of Japan Clock generator for digital demodulators

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4128811A (en) * 1977-07-05 1978-12-05 General Electric Company Frequency indicating circuit
FR2439511A1 (en) * 1978-10-16 1980-05-16 Licentia Gmbh ASSEMBLY INCLUDING A REGULATION LOOP

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1452109A (en) * 1965-06-30 1966-02-25 Materiel Telephonique Stabilized variable oscillator
FR1480358A (en) * 1966-03-31 1967-05-12 Materiel Telephonique Pulse frequency comparator
US3401353A (en) * 1967-07-06 1968-09-10 Sylvania Electric Prod Automatic coarse tuning system for a frequency synthesizer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157904A (en) * 1984-03-30 1985-10-30 Victor Company Of Japan Clock generator for digital demodulators
US4628282A (en) * 1984-03-30 1986-12-09 Victor Company Of Japan, Ltd. Clock generator for digital demodulators

Also Published As

Publication number Publication date
DD100596A1 (en) 1973-09-20
DE2334716A1 (en) 1974-03-28
FR2200678A1 (en) 1974-04-19
FR2200678B1 (en) 1977-08-12

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee