JPS61113437U - - Google Patents
Info
- Publication number
- JPS61113437U JPS61113437U JP1984199532U JP19953284U JPS61113437U JP S61113437 U JPS61113437 U JP S61113437U JP 1984199532 U JP1984199532 U JP 1984199532U JP 19953284 U JP19953284 U JP 19953284U JP S61113437 U JPS61113437 U JP S61113437U
- Authority
- JP
- Japan
- Prior art keywords
- band
- diode
- varactor diode
- tuner
- switching
- 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.)
- Pending
Links
- 230000003321 amplification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
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
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Superheterodyne Receivers (AREA)
Description
第1図は本考案チユーナの高周波増幅回路に適
用した回路図、第2図は従来の高周波増幅回路図
、第3図は従来の欠点説明図である。 TR……増幅用トランジスタ、VRD……バラ
クタダイオード、DCL……分布定数線路、L1
……VHF帯ハイチヤンネル用共振コイル、L2
……VHF帯ローチヤンネル用共振コイル、D1
〜D3……スイツチングダイオード。
用した回路図、第2図は従来の高周波増幅回路図
、第3図は従来の欠点説明図である。 TR……増幅用トランジスタ、VRD……バラ
クタダイオード、DCL……分布定数線路、L1
……VHF帯ハイチヤンネル用共振コイル、L2
……VHF帯ローチヤンネル用共振コイル、D1
〜D3……スイツチングダイオード。
Claims (1)
- UHF帯及びVHF帯を複数のバンドに分け、
選局されたチヤンネルに応じたバンド切り換え信
号を発生し、該バンドに応じた回路素子を選択し
て所定のテレビ信号を受信するチユーナにおいて
、一端が接地されたバラクタダイオードと、前記
各バンドに対応して設けられ、それぞれ一端が交
流的に接地されたコイル及び分布定数線路と、前
記各コイル及び分布定数線路の他端をそれぞれ前
記バラクタダイオードの他端に選択的に接続する
スイツチングダイオードと、各スイツチングダイ
オードをバンド切り替え信号により適宜オン/オ
フする手段を有することを特徴とするチユーナ。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1984199532U JPS61113437U (ja) | 1984-12-26 | 1984-12-26 | |
US06/813,651 US4710973A (en) | 1984-12-26 | 1985-12-26 | Varactor diode tuner with band switched coils and lines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1984199532U JPS61113437U (ja) | 1984-12-26 | 1984-12-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61113437U true JPS61113437U (ja) | 1986-07-17 |
Family
ID=16409394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1984199532U Pending JPS61113437U (ja) | 1984-12-26 | 1984-12-26 |
Country Status (2)
Country | Link |
---|---|
US (1) | US4710973A (ja) |
JP (1) | JPS61113437U (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT386499B (de) * | 1986-07-29 | 1988-08-25 | Philips Nv | Rundfunkempfaenger |
DE3633384A1 (de) * | 1986-10-01 | 1988-04-14 | Telefunken Electronic Gmbh | Fernsehtuner fuer drei unterschiedliche frequenzbereiche |
US5136719A (en) * | 1988-12-05 | 1992-08-04 | Seiko Corp. | Automatic antenna tubing method and apparatus |
US4972455A (en) * | 1989-06-23 | 1990-11-20 | Motorola, Inc. | Dual-bandwidth cellular telephone |
US5020092A (en) * | 1989-06-23 | 1991-05-28 | Motorola, Inc. | Dual-bandwidth cellular telephone |
US5287556A (en) * | 1990-09-28 | 1994-02-15 | Motorola, Inc. | Interference reduction using an adaptive receiver filter, signal strength, and BER sensing |
US5715528A (en) * | 1996-02-08 | 1998-02-03 | Ford Motor Company | Converting capacitance to inductance in a floating resonant |
US5668715A (en) * | 1996-06-27 | 1997-09-16 | Hughes Electronics | Multiple output, zero voltage switching, series resonant VHF inverter |
JP2007538450A (ja) * | 2004-05-19 | 2007-12-27 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 3帯域tv−rf入力回路 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH427931A (de) * | 1963-11-27 | 1967-01-15 | Imp Rundfunk Und Fernsehwerk G | Abstimmanordnung für ultrakurze Wellen |
AT272412B (de) * | 1965-10-13 | 1969-07-10 | Telefunken Patent | Leitungskreis für hochfrequente elektrische Schwingungen |
DE1591364B1 (de) * | 1967-04-29 | 1970-08-20 | Philips Patentverwaltung | Schaltungsanordnung zum Abstimmen |
DE2412689C3 (de) * | 1974-03-16 | 1978-04-27 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Schaltungsanordnung zur Abstimmung und Bereichs- bzw. Bandumschaltung eines HF-Schwingungskreises |
DE2828838C2 (de) * | 1977-07-01 | 1983-10-20 | Hitachi, Ltd., Tokyo | HF-Eingangsschaltung für Fernsehempfänger |
-
1984
- 1984-12-26 JP JP1984199532U patent/JPS61113437U/ja active Pending
-
1985
- 1985-12-26 US US06/813,651 patent/US4710973A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US4710973A (en) | 1987-12-01 |
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