JPS5840936U - Tuning circuit - Google Patents
Tuning circuitInfo
- Publication number
- JPS5840936U JPS5840936U JP13474881U JP13474881U JPS5840936U JP S5840936 U JPS5840936 U JP S5840936U JP 13474881 U JP13474881 U JP 13474881U JP 13474881 U JP13474881 U JP 13474881U JP S5840936 U JPS5840936 U JP S5840936U
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- band
- preset switch
- channel
- circuit
- 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
図面は本考案を実施した選局回路の回路図である。
１・・・チューナ、２・・・ＡＦＴ回路、５・・・ＡＦ
Ｔディフィート回路、７・・・＋１５Ｖ電源フイン、９
・・・第１手段、１０・・・第２手段、Ｒ１，Ｒ２，Ｒ
３・・・抵抗、ＳＷｌ、ＳＷ２，５Ｗｎ−−−選局スイ
ッチ、ＢＳ ｌ 。
ＢＳ２．ＢＳｎ・・・受信帯域プリセットスイッチ、ｄ
ｌ。
ｄ２．ｄ３・・・スイッチングダイオード、Ｄｌ、Ｄ２
゜Ｄ３・・・チャンネル表示用発光ダイオード、ＲＣ・
・・第２の抵抗。The drawing is a circuit diagram of a channel selection circuit implementing the present invention. 1...Tuner, 2...AFT circuit, 5...AF
T defeat circuit, 7...+15V power supply fin, 9
...first means, 10...second means, R1, R2, R
3...Resistor, SWl, SW2, 5Wn --- Tuning switch, BSl. BS2. BSn...Reception band preset switch, d
l. d2. d3...Switching diode, Dl, D2
゜D3... Channel display light emitting diode, RC.
...Second resistance.
Claims (1)
端に各チャンネルの受信帯域プリセットスイッチと帯域
切換え回路を接続し、前記プリセットスイッチの他端と
基準電位点間にチャンネル表示用発光ダイオードと選局
動作に応じて動作するスイッチの直列回路を接続して前
記スイッチの動作により前記発光ダイオードを点灯せし
めると共に当該点灯した発光ダイオードが受信帯域プリ
セットスイッチを介して接続されている抵抗による電圧
降下によって当該受信帯域プリセットスイッチによりプ
リセットされている帯域の設定状態になるように前記帯
域切換え回路が作動するようにな［７、且つ選局時に前
記抵抗の両端に生じる電圧変化を利用してＡＦＴディフ
ィート回路駆動用信号を得る手段を設けてなり、この手
段は前記抵抗と受信帯域プリセットスイッチの各接続点
に一端が接続された３つのスイッチングダイオードと、
一端が電源に接続され他端が前記３つのスイッチングダ
イオードの他端に共通に接続された第２の抵抗とからな
り、この抵抗とスイッチングダイオードの接続点から出
力電圧を生じることを特徴とする選局回路。Three resistors are connected to the power supply, and the receiving band preset switch and band switching circuit for each channel are connected to the other end of the resistor, and a channel display light emitting diode is connected between the other end of the preset switch and the reference potential point. A series circuit of switches that operate according to the channel selection operation is connected, and the light emitting diode is lit by the operation of the switch, and the lighted light emitting diode is caused by a voltage drop due to a resistor connected via a reception band preset switch. The band switching circuit operates so as to set the band preset by the receiving band preset switch [7, and the AFT defeat is performed using the voltage change that occurs across the resistor when selecting a channel. Means for obtaining a circuit driving signal is provided, and the means includes three switching diodes each having one end connected to each connection point between the resistor and the reception band preset switch;
A second resistor having one end connected to a power supply and the other end commonly connected to the other ends of the three switching diodes, and an output voltage is generated from a connection point between the resistor and the switching diodes. station circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13474881U JPS5840936U (en) | 1981-09-09 | 1981-09-09 | Tuning circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13474881U JPS5840936U (en) | 1981-09-09 | 1981-09-09 | Tuning circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5840936U true JPS5840936U (en) | 1983-03-17 |
| JPH0138994Y2 JPH0138994Y2 (en) | 1989-11-21 |
Family
ID=29928155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13474881U Granted JPS5840936U (en) | 1981-09-09 | 1981-09-09 | Tuning circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5840936U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS587916A (en) * | 1981-07-07 | 1983-01-17 | Sanyo Electric Co Ltd | Channel selecting circuit |
-
1981
- 1981-09-09 JP JP13474881U patent/JPS5840936U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS587916A (en) * | 1981-07-07 | 1983-01-17 | Sanyo Electric Co Ltd | Channel selecting circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0138994Y2 (en) | 1989-11-21 |
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