JPS599636U - TV tuner for wideband reception - Google Patents
TV tuner for wideband receptionInfo
- Publication number
- JPS599636U JPS599636U JP10452582U JP10452582U JPS599636U JP S599636 U JPS599636 U JP S599636U JP 10452582 U JP10452582 U JP 10452582U JP 10452582 U JP10452582 U JP 10452582U JP S599636 U JPS599636 U JP S599636U
- Authority
- JP
- Japan
- Prior art keywords
- tuner
- wideband reception
- coupling
- variable capacitance
- capacitance diode
- 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
Landscapes
- Superheterodyne Receivers (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の広帯域受信用テレビチューナのＶＨＦ受
信部の回路図、第２図ａ、 ｂ、 ｃは同テレビチュ
ーナにおけるＢ、、 Ｂ２． Ｂ３の各バンド受信時の
等価回路図、第３図は本考案の広帯域受信用テレビチュ
ーナの１実施例の回路図である。
１・・・ＲＦ増幅回路、２・・・局部発振回路、３・・
・混合回路、・Ｃ６・・・結合コンデンサ、Ｄ８・・・
結合用可変容量ダイオード。FIG. 1 is a circuit diagram of a VHF receiving section of a conventional wideband reception television tuner, and FIG. 2 a, b, and c are circuit diagrams of B, B2. FIG. 3 is a circuit diagram of an embodiment of the television tuner for wideband reception according to the present invention. 1... RF amplifier circuit, 2... local oscillation circuit, 3...
・Mixing circuit, ・C6...coupling capacitor, D8...
Coupling variable capacitance diode.
Claims (1)
に結合用可変容量ダイオードを挿入し、この可変容量ダ
イオードに同調電圧を印加して受信周波数に応じて結合
インピーダンスを可変することを特徴とする広帯域受信
用テレビチューナ。A coupling variable capacitance diode is inserted in series with a coupling capacitor that couples the RF amplification stage and the mixing stage, and a tuning voltage is applied to the variable capacitance diode to vary the coupling impedance according to the receiving frequency. TV tuner for wideband reception.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10452582U JPS599636U (en) | 1982-07-09 | 1982-07-09 | TV tuner for wideband reception |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10452582U JPS599636U (en) | 1982-07-09 | 1982-07-09 | TV tuner for wideband reception |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS599636U true JPS599636U (en) | 1984-01-21 |
Family
ID=30245393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10452582U Pending JPS599636U (en) | 1982-07-09 | 1982-07-09 | TV tuner for wideband reception |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS599636U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5593317A (en) * | 1979-01-10 | 1980-07-15 | Nec Home Electronics Ltd | Tuner circuit |
| JPS572117A (en) * | 1980-06-04 | 1982-01-07 | Fujitsu General Ltd | Tuning circuit |
| JPS57201316A (en) * | 1981-06-03 | 1982-12-09 | Mitsubishi Electric Corp | Coupling circuit |
-
1982
- 1982-07-09 JP JP10452582U patent/JPS599636U/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5593317A (en) * | 1979-01-10 | 1980-07-15 | Nec Home Electronics Ltd | Tuner circuit |
| JPS572117A (en) * | 1980-06-04 | 1982-01-07 | Fujitsu General Ltd | Tuning circuit |
| JPS57201316A (en) * | 1981-06-03 | 1982-12-09 | Mitsubishi Electric Corp | Coupling circuit |
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