GB2203006B - Local oscillators - Google Patents

Local oscillators

Info

Publication number
GB2203006B
GB2203006B GB8806714A GB8806714A GB2203006B GB 2203006 B GB2203006 B GB 2203006B GB 8806714 A GB8806714 A GB 8806714A GB 8806714 A GB8806714 A GB 8806714A GB 2203006 B GB2203006 B GB 2203006B
Authority
GB
United Kingdom
Prior art keywords
local oscillators
oscillators
local
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 - Lifetime
Application number
GB8806714A
Other languages
English (en)
Other versions
GB2203006A (en
GB8806714D0 (en
Inventor
Masaki Yamamoto
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.)
Alps Alpine Co Ltd
Original Assignee
Alps Electric 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 Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Publication of GB8806714D0 publication Critical patent/GB8806714D0/en
Publication of GB2203006A publication Critical patent/GB2203006A/en
Application granted granted Critical
Publication of GB2203006B publication Critical patent/GB2203006B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H03J5/24—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/242—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
    • H03J5/244—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection using electronic means
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability
    • H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance
    • H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H03J7/08—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using varactors, i.e. voltage variable reactive diodes
GB8806714A 1987-03-24 1988-03-21 Local oscillators Expired - Lifetime GB2203006B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4288487U JPH0434581Y2 (ja) 1987-03-24 1987-03-24

Publications (3)

Publication Number Publication Date
GB8806714D0 GB8806714D0 (en) 1988-04-20
GB2203006A GB2203006A (en) 1988-10-05
GB2203006B true GB2203006B (en) 1991-06-19

Family

ID=12648465

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8806714A Expired - Lifetime GB2203006B (en) 1987-03-24 1988-03-21 Local oscillators

Country Status (2)

Country Link
JP (1) JPH0434581Y2 (ja)
GB (1) GB2203006B (ja)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2215929A (en) * 1988-02-10 1989-09-27 Alps Electric Co Ltd Electronic tuners

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2215929A (en) * 1988-02-10 1989-09-27 Alps Electric Co Ltd Electronic tuners

Also Published As

Publication number Publication date
GB2203006A (en) 1988-10-05
JPS63149632U (ja) 1988-10-03
GB8806714D0 (en) 1988-04-20
JPH0434581Y2 (ja) 1992-08-18

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Legal Events

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

Effective date: 19930321