JPS58173936U - Channel selection device - Google Patents
Channel selection deviceInfo
- Publication number
- JPS58173936U JPS58173936U JP5245583U JP5245583U JPS58173936U JP S58173936 U JPS58173936 U JP S58173936U JP 5245583 U JP5245583 U JP 5245583U JP 5245583 U JP5245583 U JP 5245583U JP S58173936 U JPS58173936 U JP S58173936U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- switch
- pulse
- channel selection
- continuous
- 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図は請来例の選局装置の回路図、第２図は本考案の
一実施例における選局装置の回路図、第３図は同選局装
置の要部の詳細な回路図である。
１・・・・・・選局用電圧設定回路、５・・・・・・電
子的チャンネル切換回路、６・・・・・・カウンタ、７
・・・・・・デコーダ、９・・・・・・制御回路、１４
・・・・・・選局用パルス発生回路、１５・・・・・・
連続パルス発生回路、１６・・・・・・単一パルス発生
回路、１７・・・・・・連続切換指令用スイッチ、１８
・・・・・・１チャンネル分切換指令用のスイッチ、１
９・・・・・・ＮＯＲゲート、２１・・・・・・２安定
回路。Figure 1 is a circuit diagram of a conventional tuning device, Figure 2 is a circuit diagram of a tuning device according to an embodiment of the present invention, and Figure 3 is a detailed circuit diagram of the main parts of the tuning device. be. 1...Voltage setting circuit for channel selection, 5...Electronic channel switching circuit, 6...Counter, 7
... Decoder, 9 ... Control circuit, 14
...Pulse generation circuit for tuning, 15...
Continuous pulse generation circuit, 16...Single pulse generation circuit, 17...Switch for continuous switching command, 18
・・・・・・Switch for 1 channel switching command, 1
9...NOR gate, 21...2 stable circuit.
Claims (1)
個の選局用電圧を予め設定した選局用電圧設定回路と、
選局用のパルスが印加されたときに複数個の出力端子に
順次チャンネル切換用の出力を発生し上記複数個の選局
用電圧のうちに１つを選択して上記電圧可変容量ダイオ
ードに供給するカウンタを備えた電子的チャンネル切換
回路と、連続切換指令用の１個の第１のスイッチと、１
チャンネル分切換指令用の１個の第２のスイッチと、電
源投入時には必ずリセット状態になるようにプリセット
するためのプリセット回路とを備え、上記第１のスイッ
チの操作により交互にセットおよびリセットされる２安
定回路と、この２安定回路により制御され２安定回路が
セットされていてその出力が加えられている期間中連続
パルス不発生する連続パルス発生回路と、上記第２のス
イッチが操作されたときに、１個のパルスを発生する単
一パルス発生回路とを設け、前記第２のスイッチと単一
パルス発生回路の接続点と、上記連続パルス発生回路に
接続される２安定回路の出力端とをダイオードで接続し
て第２のスイッチが操作されたときにダイオードを介し
て２安定回路を強制的にリセット状態とするように構成
するとともに、上記連続パルス発生回路の出力の連続パ
ルスと上記単一パルス発生回路の出力の１個のパルスと
をともに選局用パルスとして上記電子的チャンネル切換
回路に供給する手段を設けた選局装置。a tuning voltage setting circuit that presets a plurality of tuning voltages to be applied to voltage variable capacitance diodes of an electronic tuner;
When a channel selection pulse is applied, outputs for channel switching are sequentially generated at a plurality of output terminals, and one of the plurality of channel selection voltages is selected and supplied to the voltage variable capacitance diode. one first switch for continuous switching command;
It is equipped with one second switch for commanding channel switching and a preset circuit for presetting the device so that it is always in the reset state when the power is turned on, and is alternately set and reset by operating the first switch. A bistable circuit, a continuous pulse generation circuit that is controlled by this bistable circuit and does not generate continuous pulses during the period when the bistable circuit is set and its output is applied, and when the second switch is operated. is provided with a single pulse generation circuit that generates one pulse, and a connection point between the second switch and the single pulse generation circuit, and an output end of the bistable circuit connected to the continuous pulse generation circuit. is connected with a diode so that when the second switch is operated, the bistable circuit is forcibly reset through the diode. A channel selection device comprising means for supplying one pulse output from one pulse generating circuit together as a channel selection pulse to the electronic channel switching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5245583U JPS58173936U (en) | 1983-04-07 | 1983-04-07 | Channel selection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5245583U JPS58173936U (en) | 1983-04-07 | 1983-04-07 | Channel selection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58173936U true JPS58173936U (en) | 1983-11-21 |
Family
ID=30063164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5245583U Pending JPS58173936U (en) | 1983-04-07 | 1983-04-07 | Channel selection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58173936U (en) |
-
1983
- 1983-04-07 JP JP5245583U patent/JPS58173936U/en active Pending
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