JPS58125423U - Channel selection device - Google Patents
Channel selection deviceInfo
- Publication number
- JPS58125423U JPS58125423U JP1982022027U JP2202782U JPS58125423U JP S58125423 U JPS58125423 U JP S58125423U JP 1982022027 U JP1982022027 U JP 1982022027U JP 2202782 U JP2202782 U JP 2202782U JP S58125423 U JPS58125423 U JP S58125423U
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- channel selection
- selection device
- emitter
- voltage
- 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.)
- Granted
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図はチューナのチューニング電圧に対スル受信周波
数曲線を示す図面である。第２図は従来の選局装置を示
す回路図である。第３図は本考案を実施し、た選局装置
の回路図であり、第４図は本考案の他の実施例の回路図
である。
１・・・エミッタフォロワトランジスタ、２・・・チュ
ニナ、３・・・チューニング端子、Ｒ３・・・第１抵抗
、Ｒ４・・・第２抵抗、ＶＲ□〜ＶＲ４・・・ボリウム
、十８２・・・直流電圧源。FIG. 1 is a diagram showing a tuning voltage of a tuner versus a receiving frequency curve. FIG. 2 is a circuit diagram showing a conventional channel selection device. FIG. 3 is a circuit diagram of a channel selection device implementing the present invention, and FIG. 4 is a circuit diagram of another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Emitter follower transistor, 2...Tuner, 3...Tuning terminal, R3...First resistor, R4...Second resistor, VR□~VR4...Volume, 182...・DC voltage source.
Claims (1)
ォロワトランジスタのベースにボリウムにより選定され
た電圧を印加し、そのエミッタに得られる電圧をチュー
ナのチューニング端子に印加するようにした選局装置に
おいて、前記エミッタと前記チューニング端子との間に
第１抵抗を接続すると共に前記第１抵抗の出力側を第２
抵抗を介して、前記トランジスタのベースに加わる最大
□ 、電圧よりも低い値の直流電圧源に接続したこと
を特徴とする選局装置。In the tuning device described above, a voltage selected by a regulator is applied to the base of an emitter follower transistor whose emitter is connected to ground via a resistor, and the voltage obtained at the emitter is applied to a tuning terminal of a tuner. A first resistor is connected between the emitter and the tuning terminal, and the output side of the first resistor is connected to a second resistor.
A channel selection device characterized in that the channel selection device is connected to a DC voltage source having a value lower than the maximum voltage applied to the base of the transistor via a resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982022027U JPS58125423U (en) | 1982-02-17 | 1982-02-17 | Channel selection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982022027U JPS58125423U (en) | 1982-02-17 | 1982-02-17 | Channel selection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58125423U true JPS58125423U (en) | 1983-08-26 |
| JPH0112430Y2 JPH0112430Y2 (en) | 1989-04-11 |
Family
ID=30034124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1982022027U Granted JPS58125423U (en) | 1982-02-17 | 1982-02-17 | Channel selection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58125423U (en) |
-
1982
- 1982-02-17 JP JP1982022027U patent/JPS58125423U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0112430Y2 (en) | 1989-04-11 |
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