GB2215929B - Electronic tuners - Google Patents

Electronic tuners

Info

Publication number
GB2215929B
GB2215929B GB8903026A GB8903026A GB2215929B GB 2215929 B GB2215929 B GB 2215929B GB 8903026 A GB8903026 A GB 8903026A GB 8903026 A GB8903026 A GB 8903026A GB 2215929 B GB2215929 B GB 2215929B
Authority
GB
United Kingdom
Prior art keywords
electronic tuners
tuners
electronic
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
GB8903026A
Other versions
GB8903026D0 (en
GB2215929A (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 GB8903026D0 publication Critical patent/GB8903026D0/en
Publication of GB2215929A publication Critical patent/GB2215929A/en
Application granted granted Critical
Publication of GB2215929B publication Critical patent/GB2215929B/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
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • 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
GB8903026A 1988-02-10 1989-02-10 Electronic tuners Expired - Lifetime GB2215929B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988016910U JPH0644185Y2 (en) 1988-02-10 1988-02-10 Local oscillator circuit in electronic tuning tuner

Publications (3)

Publication Number Publication Date
GB8903026D0 GB8903026D0 (en) 1989-03-30
GB2215929A GB2215929A (en) 1989-09-27
GB2215929B true GB2215929B (en) 1992-01-29

Family

ID=11929295

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8903026A Expired - Lifetime GB2215929B (en) 1988-02-10 1989-02-10 Electronic tuners

Country Status (3)

Country Link
JP (1) JPH0644185Y2 (en)
KR (1) KR910001650Y1 (en)
GB (1) GB2215929B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0434581Y2 (en) * 1987-03-24 1992-08-18
DE3939742C1 (en) * 1989-12-01 1990-12-06 Telefunken Electronic Gmbh, 7100 Heilbronn, De
DE4314424A1 (en) * 1993-05-03 1994-11-10 Philips Patentverwaltung oscillator
GB9501243D0 (en) * 1995-01-23 1995-03-15 Rca Thomson Licensing Corp Local oscillator using digital handswitching
US5973519A (en) * 1997-01-20 1999-10-26 Nec Corporation Voltage controlled oscillator circuit capable of switching between oscillation frequency bands
GB2337382B (en) * 1998-05-16 2000-12-13 Motorola Ltd Voltage controlled oscillator
EP1867045A2 (en) * 2005-03-29 2007-12-19 Nxp B.V. Receiver having a tuning capacitance

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57158232U (en) * 1981-03-30 1982-10-05

Also Published As

Publication number Publication date
GB8903026D0 (en) 1989-03-30
KR910001650Y1 (en) 1991-03-18
JPH0644185Y2 (en) 1994-11-14
JPH01126628U (en) 1989-08-30
KR890018301U (en) 1989-09-09
GB2215929A (en) 1989-09-27

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Legal Events

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

Effective date: 19930210