GB2100534B - Frequency synthesiser - Google Patents

Frequency synthesiser

Info

Publication number
GB2100534B
GB2100534B GB8118473A GB8118473A GB2100534B GB 2100534 B GB2100534 B GB 2100534B GB 8118473 A GB8118473 A GB 8118473A GB 8118473 A GB8118473 A GB 8118473A GB 2100534 B GB2100534 B GB 2100534B
Authority
GB
United Kingdom
Prior art keywords
frequency synthesiser
synthesiser
frequency
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
GB8118473A
Other versions
GB2100534A (en
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB8118473A priority Critical patent/GB2100534B/en
Publication of GB2100534A publication Critical patent/GB2100534A/en
Application granted granted Critical
Publication of GB2100534B publication Critical patent/GB2100534B/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
    • H03L7/197—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
    • 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
    • H03L7/14—Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail or are interrupted
    • H03L7/141—Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail or are interrupted the phase-locked loop controlling several oscillators in turn
    • 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
GB8118473A 1981-06-16 1981-06-16 Frequency synthesiser Expired GB2100534B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8118473A GB2100534B (en) 1981-06-16 1981-06-16 Frequency synthesiser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8118473A GB2100534B (en) 1981-06-16 1981-06-16 Frequency synthesiser

Publications (2)

Publication Number Publication Date
GB2100534A GB2100534A (en) 1982-12-22
GB2100534B true GB2100534B (en) 1985-04-03

Family

ID=10522540

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8118473A Expired GB2100534B (en) 1981-06-16 1981-06-16 Frequency synthesiser

Country Status (1)

Country Link
GB (1) GB2100534B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4987373A (en) * 1989-09-01 1991-01-22 Chrontel, Inc. Monolithic phase-locked loop
DE4126915A1 (en) * 1991-08-14 1993-02-18 Siemens Ag INTEGRATED FREQUENCY SYNTHESIZER CIRCUIT FOR TRANSMITTER AND RECEIVER OPERATION
GB0025902D0 (en) * 2000-10-23 2000-12-06 Simoco Int Ltd Radio transmitters
CN111262582B (en) * 2020-02-13 2023-06-27 广州全盛威信息技术有限公司 Ultra wideband frequency generator for generating multi-phase local oscillation signals

Also Published As

Publication number Publication date
GB2100534A (en) 1982-12-22

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Legal Events

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