JPS6164738U - - Google Patents
Info
- Publication number
- JPS6164738U JPS6164738U JP13547584U JP13547584U JPS6164738U JP S6164738 U JPS6164738 U JP S6164738U JP 13547584 U JP13547584 U JP 13547584U JP 13547584 U JP13547584 U JP 13547584U JP S6164738 U JPS6164738 U JP S6164738U
- Authority
- JP
- Japan
- Prior art keywords
- variable resistance
- resistance element
- tuning voltage
- television receiver
- 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.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
第１図は本考案のテレビジヨン受信機用選局回
路の一実施例を示す回路図。
１…同調電圧供給素子、ａｂｃ…中間タツプ付
可変抵抗素子、ＳＷ１…スイツチ素子、ＳＷ２…
スイツチ素子、２…ＵＨＦ、ＶＨＦバンド切り換
えスイツチ、Ｄ１…ＶＬ，ＶＨ切換用ダイオード
、Ｒ１，Ｒ２，Ｒ３，Ｒ４，Ｒ５，Ｒ６…抵抗素
子。
第２図は従来のテレビジヨン受信機用選局回路
を示す回路図。
１…同調電圧供給素子、ａｂｃ…中間タツプ付
可変抵抗素子、ＳＷ１…スイツチ素子、ＳＷ２…
スイツチ素子、２…ＵＨＦ，ＶＨＦバンド切り換
えスイツチ、Ｑ１…ＨＢ駆動用トランジスタ、Ｑ
２…ＬＢ駆動トランジスタ、Ｑ３…ＶＨ可変抵抗
素子切り換えトランジスタ、Ｑ４…ＶＬ可変抵抗
素子切り換えトランジスタ、Ｒ１，Ｒ２，Ｒ３，
Ｒ４，Ｒ５，Ｒ６，Ｒ７，Ｒ８，Ｒ９…抵抗素子
。
FIG. 1 is a circuit diagram showing an embodiment of the channel selection circuit for a television receiver according to the present invention. 1... Tuning voltage supply element, abc... Variable resistance element with intermediate tap, SW1... Switch element, SW2...
Switch element, 2...UHF, VHF band switching switch, D1...VL, VH switching diode, R1, R2, R3, R4, R5, R6... Resistance element. FIG. 2 is a circuit diagram showing a conventional channel selection circuit for a television receiver. 1... Tuning voltage supply element, abc... Variable resistance element with intermediate tap, SW1... Switch element, SW2...
Switch element, 2...UHF, VHF band switching switch, Q1...HB drive transistor, Q
2...LB drive transistor, Q3...VH variable resistance element switching transistor, Q4...VL variable resistance element switching transistor, R1, R2, R3,
R4, R5, R6, R7, R8, R9...resistance elements.
Claims (1)
抵抗素子の摺動子に同期して中間タツプ付近で切
り換わるスイツチ素子からなる同調電圧供給素子
を用いるテレビジヨン受信機用選局回路において
前記可変抵抗素子の中間タツプに、ＶＨＦバンド
受信時にスイツチング用ダイオードを介して同調
電圧用電源を接続し、受信バンドに応じて前記可
変抵抗素子の利用範囲を切り換えて、テレビ受信
回路に適正範囲の同調電圧電源を供給することを
特徴とするテレビジヨン受信機用選局回路。 In a tuning circuit for a television receiver that uses a tuning voltage supply element consisting of a variable resistance element having an intermediate tap and a switch element that switches near the intermediate tap in synchronization with a slider of the variable resistance element, the variable resistance element A tuning voltage power supply is connected to the middle tap of the VHF band via a switching diode during reception of the VHF band, and the usage range of the variable resistance element is switched according to the receiving band, so that a tuning voltage power supply within an appropriate range is supplied to the TV receiving circuit. 1. A channel selection circuit for a television receiver, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13547584U JPS6164738U (en) | 1984-09-06 | 1984-09-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13547584U JPS6164738U (en) | 1984-09-06 | 1984-09-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6164738U true JPS6164738U (en) | 1986-05-02 |
Family
ID=30693959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13547584U Pending JPS6164738U (en) | 1984-09-06 | 1984-09-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6164738U (en) |
-
1984
- 1984-09-06 JP JP13547584U patent/JPS6164738U/ja active Pending
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