GB2089603B - Frequency synthesisers - Google Patents

Frequency synthesisers

Info

Publication number
GB2089603B
GB2089603B GB8137598A GB8137598A GB2089603B GB 2089603 B GB2089603 B GB 2089603B GB 8137598 A GB8137598 A GB 8137598A GB 8137598 A GB8137598 A GB 8137598A GB 2089603 B GB2089603 B GB 2089603B
Authority
GB
United Kingdom
Prior art keywords
frequency synthesisers
synthesisers
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
GB8137598A
Other versions
GB2089603A (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.)
Plessey Co Ltd
Original Assignee
Plessey Co 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB8137598A priority Critical patent/GB2089603B/en
Publication of GB2089603A publication Critical patent/GB2089603A/en
Application granted granted Critical
Publication of GB2089603B publication Critical patent/GB2089603B/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
    • 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
    • H03L7/22—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using more than one loop
    • H03L7/23—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using more than one loop with pulse counters or frequency dividers
    • H03L7/235—Nested phase locked loops
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L2207/00—Indexing scheme relating to automatic control of frequency or phase and to synchronisation
    • H03L2207/18—Temporarily disabling, deactivating or stopping the frequency counter or divider
GB8137598A 1980-12-16 1981-12-14 Frequency synthesisers Expired GB2089603B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8137598A GB2089603B (en) 1980-12-16 1981-12-14 Frequency synthesisers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8040272 1980-12-16
GB8137598A GB2089603B (en) 1980-12-16 1981-12-14 Frequency synthesisers

Publications (2)

Publication Number Publication Date
GB2089603A GB2089603A (en) 1982-06-23
GB2089603B true GB2089603B (en) 1984-06-13

Family

ID=26277869

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8137598A Expired GB2089603B (en) 1980-12-16 1981-12-14 Frequency synthesisers

Country Status (1)

Country Link
GB (1) GB2089603B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5867536A (en) * 1997-02-11 1999-02-02 Hittite Microwave Corporation Digital synchronization of broadcast frequency

Also Published As

Publication number Publication date
GB2089603A (en) 1982-06-23

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Legal Events

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

Effective date: 20001214