GB8613784D0 - Frequency synthesisers - Google Patents

Frequency synthesisers

Info

Publication number
GB8613784D0
GB8613784D0 GB868613784A GB8613784A GB8613784D0 GB 8613784 D0 GB8613784 D0 GB 8613784D0 GB 868613784 A GB868613784 A GB 868613784A GB 8613784 A GB8613784 A GB 8613784A GB 8613784 D0 GB8613784 D0 GB 8613784D0
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.)
Withdrawn
Application number
GB868613784A
Other versions
GB2191352A (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 GB08613784A priority Critical patent/GB2191352A/en
Publication of GB8613784D0 publication Critical patent/GB8613784D0/en
Priority claimed from PCT/GB1987/000535 external-priority patent/WO1989001261A1/en
Publication of GB2191352A publication Critical patent/GB2191352A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
    • H03J5/0272—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer
    • H03J5/0281—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer the digital values being held in an auxiliary non erasable memory
GB08613784A 1986-06-06 1986-06-06 Frequency synthesiser Withdrawn GB2191352A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08613784A GB2191352A (en) 1986-06-06 1986-06-06 Frequency synthesiser

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB08613784A GB2191352A (en) 1986-06-06 1986-06-06 Frequency synthesiser
PCT/GB1987/000535 WO1989001261A1 (en) 1987-07-28 1987-07-28 Frequency synthesisers

Publications (2)

Publication Number Publication Date
GB8613784D0 true GB8613784D0 (en) 1986-07-09
GB2191352A GB2191352A (en) 1987-12-09

Family

ID=26290873

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08613784A Withdrawn GB2191352A (en) 1986-06-06 1986-06-06 Frequency synthesiser

Country Status (1)

Country Link
GB (1) GB2191352A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989001261A1 (en) * 1987-07-28 1989-02-09 Plessey Overseas Limited Frequency synthesisers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3928813A (en) * 1974-09-26 1975-12-23 Hewlett Packard Co Device for synthesizing frequencies which are rational multiples of a fundamental frequency
GB1581525A (en) * 1976-08-04 1980-12-17 Plessey Co Ltd Frequency synthesis control system
US4321555A (en) * 1980-04-16 1982-03-23 King Radio Corporation Universal frequency synthesizer
JPS58107715A (en) * 1981-12-22 1983-06-27 Sony Corp Channel selecting device
US4629999A (en) * 1983-12-27 1986-12-16 North American Philips Corp. Phase-locked loop capable of generating a plurality of stable frequency signals

Also Published As

Publication number Publication date
GB2191352A (en) 1987-12-09

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)