JPS58138428U - Channel selection device - Google Patents

Channel selection device

Info

Publication number
JPS58138428U
JPS58138428U JP3570082U JP3570082U JPS58138428U JP S58138428 U JPS58138428 U JP S58138428U JP 3570082 U JP3570082 U JP 3570082U JP 3570082 U JP3570082 U JP 3570082U JP S58138428 U JPS58138428 U JP S58138428U
Authority
JP
Japan
Prior art keywords
band
switching transistor
tuning
emitter
transistor
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
Application number
JP3570082U
Other languages
Japanese (ja)
Inventor
常盤　信義
Original Assignee
三洋電機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 三洋電機株式会社 filed Critical 三洋電機株式会社
Priority to JP3570082U priority Critical patent/JPS58138428U/en
Publication of JPS58138428U publication Critical patent/JPS58138428U/en
Pending legal-status Critical Current

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

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はテレビ放送バンドとチューニング電圧との関係
を示すチューナの受信周波数特性図であ　　２る。第２
図は本考案を実施した選局装置の回路図である。 １・・・選局手段、３・・・エミッタフォロワトランジ
スタ、４二・・出力端子、５・・・バンド切換え回路、
６００．チューナ、ＳＷ工、　ｓｗ２．　ｓｗ３・・・
プリセットスイッチ、Ｒ□、Ｒ２・・・第１、第２抵抗
、ＴＲ・・・スイッチングトランジスタ、ＶＬ、ｖＨ９
Ｕ・・・バンド端子。FIG. 1 is a reception frequency characteristic diagram of a tuner showing the relationship between the television broadcast band and the tuning voltage. Second
The figure is a circuit diagram of a channel selection device implementing the present invention. DESCRIPTION OF SYMBOLS 1... Tuning means, 3... Emitter follower transistor, 42... Output terminal, 5... Band switching circuit,
600. Tuner, SW engineering, sw2. sw3...
Preset switch, R□, R2...first and second resistors, TR...switching transistor, VL, vH9
U...Band terminal.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 選局手段により選局されたチューニング電圧をエミッタ
フォロワトランジスタのベースに加えエミッタから出力
端子に導出するようにし且つ前記選局手段によってバン
ドプリセットスイッチを通してバンド切換え回路が駆動
されるようにした選局装置において、前記エミッタフォ
ロワトランジスタのエミッタとアース間に接続した抵抗
にスイッチングトランジスタの出力電極を接続し、この
スイッチングトランジスタの制御電極を前記バンドプリ
セットスイッチの特定のバンド端子に接続し、そのバン
ドのチャンネルが選択されたとき前記スイッチングトラ
ンジスタがオンして前記抵抗にスイッチングトランジス
タからの電流が流れ当　　　“該バンドのチューニング
電圧の下限を制限することを特徴とする選局装置。A tuning device in which a tuning voltage selected by a tuning means is added to the base of an emitter follower transistor and is led out from the emitter to an output terminal, and a band switching circuit is driven by the tuning means through a band preset switch. , the output electrode of the switching transistor is connected to a resistor connected between the emitter of the emitter follower transistor and ground, and the control electrode of this switching transistor is connected to a specific band terminal of the band preset switch, so that the channel of that band is When selected, the switching transistor is turned on and a current from the switching transistor flows through the resistor, thereby limiting a lower limit of the tuning voltage of the corresponding band.
JP3570082U 1982-03-12 1982-03-12 Channel selection device Pending JPS58138428U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3570082U JPS58138428U (en) 1982-03-12 1982-03-12 Channel selection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3570082U JPS58138428U (en) 1982-03-12 1982-03-12 Channel selection device

Publications (1)

Publication Number Publication Date
JPS58138428U true JPS58138428U (en) 1983-09-17

Family

ID=30047161

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3570082U Pending JPS58138428U (en) 1982-03-12 1982-03-12 Channel selection device

Country Status (1)

Country Link
JP (1) JPS58138428U (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56129420A (en) * 1980-03-14 1981-10-09 Sanyo Electric Co Ltd Channel selector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56129420A (en) * 1980-03-14 1981-10-09 Sanyo Electric Co Ltd Channel selector

Similar Documents

Publication Publication Date Title
JPS58138428U (en) Channel selection device
JPS5899927U (en) Tuner band switching circuit
JPS6312913U (en)
JPS58125423U (en) Channel selection device
KR900009924Y1 (en) Automatic converter for television channel
JPS6016112Y2 (en) Multi-band electronic tuning tuner device
JPS6095736U (en) Automatic frequency control circuit of receiver
JPS6138288Y2 (en)
JPS586431U (en) Tuner malfunction prevention circuit
JPS6244538U (en)
JPS6114580U (en) Peaking circuit
JPS604025U (en) tuning device
JPS5988979U (en) Television receiver AFT malfunction prevention circuit
JPS58176209U (en) Tape recorder muting circuit
JPS58178744U (en) Prescaler interface circuit
JPS5973821U (en) electronic volume device
JPS59189313U (en) variable frequency oscillation circuit
JPS5959053U (en) portable receiver
JPH04239227A (en) Switch circuit for bs tuner
JPS60181965U (en) deflection circuit
JPS59157333U (en) television receiver
JPS63149630U (en)
JPS58161318U (en) Television receiver AGC switching circuit
JPS58158533U (en) Electronic tuner device
JPS5830917U (en) Tape recorder muting circuit