JPS5994437U - electronic tuner - Google Patents
electronic tunerInfo
- Publication number
- JPS5994437U JPS5994437U JP19019782U JP19019782U JPS5994437U JP S5994437 U JPS5994437 U JP S5994437U JP 19019782 U JP19019782 U JP 19019782U JP 19019782 U JP19019782 U JP 19019782U JP S5994437 U JPS5994437 U JP S5994437U
- Authority
- JP
- Japan
- Prior art keywords
- switch
- voltage
- emitting diode
- light emitting
- terminal
- 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図は従来の電子チューナの回路図である。
第2図および第3図はこの考案の実施例の回路図である
図において、3は同調電圧発生回路、4は帯域切換回路
、5a、 5b、・・・、5Nは発光ダイオード、7
a、 7b、・・・、7Nは逆電圧防止ダイオード、
8a、5b、−,5Nは第1のスイッチ、8a′。
8b′、・・・、8N′は第2のスイッチ、41L。
41Hは帯域切換回路の制御端子、12.13は電圧制
限トランジスタ、14.15は抵抗を示す。FIG. 1 is a circuit diagram of a conventional electronic tuner. 2 and 3 are circuit diagrams of an embodiment of this invention, in which 3 is a tuning voltage generation circuit, 4 is a band switching circuit, 5a, 5b, . . . , 5N is a light emitting diode, and 7
a, 7b,..., 7N are reverse voltage prevention diodes,
8a, 5b, -, 5N are first switches 8a'. 8b', . . . , 8N' are second switches 41L. 41H is a control terminal of the band switching circuit, 12.13 is a voltage limiting transistor, and 14.15 is a resistor.
Claims (1)
ーナに同調電圧発生回路から所定の電圧を与える第1の
スイッチ、 アノードに電圧か印加された発光ダイオード、前記発光
ダイオードのカソードに直接接続され、オンされること
によりそのカソードを基準電位にして、発光ダイオード
を発光させる第2のスイッチ、 前記第1のスイッチと第2のスイッチとは連動して切換
えられ、 ゛ 前記第2のスイッチに接続され、そのスイッチのオンに
より基準電位となる一方端子を有する帯域切換スイッチ
、 その帯域切換スイッチは前記−万端子に選択的に接続さ
れる少なくとも2つの他方端子を有し、前記少なくとも
2つの他方端子にそれぞれ接続される少なくとも2つの
制御端子を備え、その制御端子の電圧に応答して、前記
チューナに所定の帯域切換電圧を印加する帯域切換回路
、前記帯域切換スイッチの各他方端子と制御端子との間
に挿入して直列接続され、そのベースには前記発光ダイ
オードの逆耐電圧以下の電圧が印加されているトランジ
スタ、を含む電子チューナ。[Claims for Utility Model Registration] A first switch that is turned on by tuning to apply a predetermined voltage from a tuning voltage generation circuit to the tuner through the switch, a light emitting diode having a voltage applied to its anode, and a light emitting diode having a voltage applied to its anode; a second switch directly connected to the cathode and turned on to set the cathode to a reference potential and cause the light emitting diode to emit light; the first switch and the second switch are switched in conjunction; a band selector switch having one terminal which is connected to the switch No. 2 and becomes a reference potential when the switch is turned on; the band selector switch has at least two other terminals which are selectively connected to the -10,000 terminal; a band switching circuit comprising at least two control terminals each connected to at least two other terminals, and applying a predetermined band switching voltage to the tuner in response to the voltage of the control terminal; An electronic tuner including a transistor inserted and connected in series between a terminal and a control terminal, and having a base applied with a voltage equal to or lower than the reverse withstand voltage of the light emitting diode.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19019782U JPS5994437U (en) | 1982-12-14 | 1982-12-14 | electronic tuner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19019782U JPS5994437U (en) | 1982-12-14 | 1982-12-14 | electronic tuner |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5994437U true JPS5994437U (en) | 1984-06-27 |
Family
ID=30409873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19019782U Pending JPS5994437U (en) | 1982-12-14 | 1982-12-14 | electronic tuner |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5994437U (en) |
-
1982
- 1982-12-14 JP JP19019782U patent/JPS5994437U/en active Pending
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