JPS60116730U - electronic tuning tuner - Google Patents
electronic tuning tunerInfo
- Publication number
- JPS60116730U JPS60116730U JP427784U JP427784U JPS60116730U JP S60116730 U JPS60116730 U JP S60116730U JP 427784 U JP427784 U JP 427784U JP 427784 U JP427784 U JP 427784U JP S60116730 U JPS60116730 U JP S60116730U
- Authority
- JP
- Japan
- Prior art keywords
- electronic tuning
- diode
- tuning tuner
- circuit
- 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
Landscapes
- 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、第２図及び第３図は従来例の電子同調チューナ
の要部回路図、第４図は本考案の実施例の要部回路図で
ある。
１（よ電子同調チューナ、２は局部発振回路、３は同調
回路、４，５は端子、６は増幅器、Ｑは局部発振用トラ
ンジスタ、Ｃ１〜Ｃ７はコンデンサ、Ｒ１−Ｒ１２は抵
抗、ＤＩ、Ｄ２はスイッチングダイオード、Ｄ３は整流
用ダイオード、ＣＤＩ、ＣＤ２は可変容量ダイオード、
Ｌｌ、Ｌ３は□ハイバンド用コイル、Ｌ２．Ｌ４はロー
バンド用コイルである。1, 2, and 3 are circuit diagrams of the main parts of a conventional electronic tuning tuner, and FIG. 4 is a circuit diagram of the main parts of an embodiment of the present invention. 1 (electronic tuning tuner, 2 is a local oscillation circuit, 3 is a tuning circuit, 4 and 5 are terminals, 6 is an amplifier, Q is a local oscillation transistor, C1 to C7 are capacitors, R1 to R12 are resistors, DI, D2 is a switching diode, D3 is a rectifier diode, CDI and CD2 are variable capacitance diodes,
Ll and L3 are □ high band coils, L2. L4 is a low band coil.
Claims (1)
とローバンドとの切換えを行う電子同調チューナに於い
て、局部発振回路の出力を整流するダイオードと、該ダ
イオードの整流出力電圧を前記局部発振回路を含むハイ
バンドとローバンドとの切換えを行うスイッチングダイ
オードに逆バイアスとして加える回路と、該スイッチン
グダイオードに順方向バイアスを加える回路とを設けた
ことを特徴とする電子同調チューナ。In an electronic tuning tuner that switches between a high band and a low band by turning on and off a switching diode, there is a diode that rectifies the output of a local oscillation circuit, and a rectified output voltage of the diode is connected to a high band including the local oscillation circuit. An electronic tuning tuner comprising: a circuit that applies a reverse bias to a switching diode that performs switching between a low band and a circuit that applies a forward bias to the switching diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP427784U JPS60116730U (en) | 1984-01-18 | 1984-01-18 | electronic tuning tuner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP427784U JPS60116730U (en) | 1984-01-18 | 1984-01-18 | electronic tuning tuner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60116730U true JPS60116730U (en) | 1985-08-07 |
Family
ID=30479695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP427784U Pending JPS60116730U (en) | 1984-01-18 | 1984-01-18 | electronic tuning tuner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60116730U (en) |
-
1984
- 1984-01-18 JP JP427784U patent/JPS60116730U/en active Pending
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