GB1447418A - Frequency synthesiser - Google Patents

Frequency synthesiser

Info

Publication number
GB1447418A
GB1447418A GB1399774A GB1399774A GB1447418A GB 1447418 A GB1447418 A GB 1447418A GB 1399774 A GB1399774 A GB 1399774A GB 1399774 A GB1399774 A GB 1399774A GB 1447418 A GB1447418 A GB 1447418A
Authority
GB
United Kingdom
Prior art keywords
output
divider
frequency
vfo
input
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
GB1399774A
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.)
Philips Components Ltd
Original Assignee
Mullard Ltd
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 Mullard Ltd filed Critical Mullard Ltd
Priority to GB1399774A priority Critical patent/GB1447418A/en
Publication of GB1447418A publication Critical patent/GB1447418A/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
    • H03L7/16—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
    • H03L7/1806—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 the frequency divider comprising a phase accumulator generating the frequency divided signal
    • 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
    • H03L7/185—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 a mixer in the loop
    • 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
    • H03L7/1974—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 fractional frequency division
    • H03L7/1976—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 fractional frequency division using a phase accumulator for controlling the counter or frequency divider
    • H03L7/1978—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 fractional frequency division using a phase accumulator for controlling the counter or frequency divider using a cycle or pulse removing circuit

Abstract

1447418 Automatic frequency control MULLARD Ltd 29 March 1974 13997/74 Heading H3A In a frequency synthesizer of the phase locked loop type, the phase of a variable frequency oscillator output is compared with that of a reference clock generator after frequency reduction by an adjustable accumulator whose residue is converted in a D/A converter to produce a signal which is balanced against the phase comparator output to compensate for irregularities in the pulse repetition rate of one of the phase comparator inputs. In one embodiment, Fig. 3, the divided down output of the VFO and the clock pulse generator CPG are compared in phase comparator PC to produce an output which is applied to one input of a summer ASD whose output is the control signal for the VFO. The output from the clock pulse generator is also fed via a programmable multiplier RM and a counter type divider D1 to a circuit PS which inhibits a pulse from the VFO each time a pulse is produced at the output of divider D1, so that the output frequency FD from the programmable divider PRD is equal to that from divider D2. The remainder signal in divider D1 is fed to the digital/analogue converter which provides a second input to the summer ASD. The multiplier RM and divider D1 may be replaced by a single device which may receive its input from the output of divider PRD, Fig. 2 (not shown), or which may be connected in place of divider D2, Fig. 1 (not shown). In this last mentioned arrangement the circuit PS is omitted.
GB1399774A 1974-03-29 1974-03-29 Frequency synthesiser Expired GB1447418A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1399774A GB1447418A (en) 1974-03-29 1974-03-29 Frequency synthesiser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1399774A GB1447418A (en) 1974-03-29 1974-03-29 Frequency synthesiser

Publications (1)

Publication Number Publication Date
GB1447418A true GB1447418A (en) 1976-08-25

Family

ID=10033144

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1399774A Expired GB1447418A (en) 1974-03-29 1974-03-29 Frequency synthesiser

Country Status (1)

Country Link
GB (1) GB1447418A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3040387A1 (en) * 1979-10-30 1981-06-11 Naamloze Vennootschap Philips' Gloeilampenfabrieken, Eindhoven FREQUENCY SYNTHESIS ARRANGEMENT
FR2474258A1 (en) * 1980-01-21 1981-07-24 Philips Nv FREQUENCY SYNTHESIZER OF THE REACTION LOOP TYPE HAVING A PHASE ATTACHMENT
EP0089723A1 (en) * 1982-03-19 1983-09-28 Philips Electronics Uk Limited Frequency synthesiser
EP0089719A1 (en) * 1982-03-19 1983-09-28 Philips Electronics Uk Limited Frequency synthesiser
EP0089721A1 (en) * 1982-03-19 1983-09-28 Philips Electronics Uk Limited Frequency synthesiser
EP0093433A2 (en) * 1982-05-04 1983-11-09 Siemens Aktiengesellschaft Oscillator circuit
EP0109122A2 (en) * 1982-11-05 1984-05-23 Philips Electronics Uk Limited Frequency synthesiser
GB2132025A (en) * 1982-11-11 1984-06-27 Polytechnic Marine Limited A receiver for a phase comparison radio navigation system
GB2184617A (en) * 1985-07-30 1987-06-24 Chung Kwan Tsang Fast frequency switching fractional synthesizer
EP0438620A1 (en) * 1990-01-24 1991-07-31 Siemens Aktiengesellschaft Method and circuit arrangement for the minimization of an a.c. component in the phase detector output signal of a phase locked loop
US5097219A (en) * 1988-12-15 1992-03-17 Mitsubishi Denki Kabushiki Kaisha Pll for controlling frequency deviation of a variable frequency oscillator
WO1996021279A2 (en) * 1995-01-06 1996-07-11 X Integrated Circuits B.V. Frequency synthesizer

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3040387A1 (en) * 1979-10-30 1981-06-11 Naamloze Vennootschap Philips' Gloeilampenfabrieken, Eindhoven FREQUENCY SYNTHESIS ARRANGEMENT
FR2474258A1 (en) * 1980-01-21 1981-07-24 Philips Nv FREQUENCY SYNTHESIZER OF THE REACTION LOOP TYPE HAVING A PHASE ATTACHMENT
DE3101589A1 (en) * 1980-01-21 1982-01-28 Naamloze Vennootschap Philips' Gloeilampenfabrieken, Eindhoven FREQUENCY SYNTHESIS CIRCUIT OF THE PHASE LOCKING LOOP TYPE
US4380743A (en) 1980-01-21 1983-04-19 U.S. Philips Corporation Frequency synthesizer of the phase lock loop type
US4536718A (en) * 1982-03-15 1985-08-20 U.S. Philips Corporation Jitter reduction circuit for frequency synthesizer
EP0089721A1 (en) * 1982-03-19 1983-09-28 Philips Electronics Uk Limited Frequency synthesiser
US4746870A (en) * 1982-03-19 1988-05-24 U.S. Philips Corporation Wide range frequency synthesizer with reduced jitter
GB2117197A (en) * 1982-03-19 1983-10-05 Philips Electronic Associated Frequency synthesiser
EP0089719A1 (en) * 1982-03-19 1983-09-28 Philips Electronics Uk Limited Frequency synthesiser
EP0089723A1 (en) * 1982-03-19 1983-09-28 Philips Electronics Uk Limited Frequency synthesiser
US4602219A (en) * 1982-03-19 1986-07-22 U.S. Philips Corporation Jitter reduction circuit for frequency synthesizer
EP0093433A2 (en) * 1982-05-04 1983-11-09 Siemens Aktiengesellschaft Oscillator circuit
EP0093433A3 (en) * 1982-05-04 1985-07-03 Siemens Aktiengesellschaft Oscillator circuit
EP0109122A2 (en) * 1982-11-05 1984-05-23 Philips Electronics Uk Limited Frequency synthesiser
EP0109122A3 (en) * 1982-11-05 1985-10-09 Philips Electronic And Associated Industries Limited Frequency synthesiser
US4599579A (en) * 1982-11-05 1986-07-08 U.S. Philips Corporation Frequency synthesizer having jitter compensation
GB2132025A (en) * 1982-11-11 1984-06-27 Polytechnic Marine Limited A receiver for a phase comparison radio navigation system
GB2184617A (en) * 1985-07-30 1987-06-24 Chung Kwan Tsang Fast frequency switching fractional synthesizer
US5097219A (en) * 1988-12-15 1992-03-17 Mitsubishi Denki Kabushiki Kaisha Pll for controlling frequency deviation of a variable frequency oscillator
EP0438620A1 (en) * 1990-01-24 1991-07-31 Siemens Aktiengesellschaft Method and circuit arrangement for the minimization of an a.c. component in the phase detector output signal of a phase locked loop
WO1996021279A2 (en) * 1995-01-06 1996-07-11 X Integrated Circuits B.V. Frequency synthesizer
NL9500034A (en) * 1995-01-06 1996-08-01 X Integrated Circuits Bv Frequency synthesis circuit.
WO1996021279A3 (en) * 1995-01-06 1996-09-06 X Integrated Circuits Bv Frequency synthesizer
US5905388A (en) * 1995-01-06 1999-05-18 X Integrated Circuits B.V. Frequency synthesizer
AU709066B2 (en) * 1995-01-06 1999-08-19 X Integrated Circuits B.V. Frequency synthesizer

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930329