JPS6045529U - Multi-band electronically tuned receiver - Google Patents

Multi-band electronically tuned receiver

Info

Publication number
JPS6045529U
JPS6045529U JP13847683U JP13847683U JPS6045529U JP S6045529 U JPS6045529 U JP S6045529U JP 13847683 U JP13847683 U JP 13847683U JP 13847683 U JP13847683 U JP 13847683U JP S6045529 U JPS6045529 U JP S6045529U
Authority
JP
Japan
Prior art keywords
band
frequency tuning
tuning circuit
high frequency
switching 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
JP13847683U
Other languages
Japanese (ja)
Inventor
増原　正美
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP13847683U priority Critical patent/JPS6045529U/en
Publication of JPS6045529U publication Critical patent/JPS6045529U/en
Pending legal-status Critical Current

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  • 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) [Abstract] 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 drawings]

第１図は従来の複数バンドの電子同調受信機を示す回路
図、第２図は本考案に係る複数パッドの電子同調受信機
の一実施例を示す回路図である。 １・・・長波パッド用アンテナ同調回路、２・・・中波
バンド用アンテナ同調回路、Ｓ・・・バンド切換スイッ
チ、Ｑｌｔ　Ｑ２・・・第１第２のスイッチングトラン
ジスタ、Ｄｌ・・・可変容量ダイオード。FIG. 1 is a circuit diagram showing a conventional multi-band electronic tuning receiver, and FIG. 2 is a circuit diagram showing an embodiment of a multi-pad electronic tuning receiver according to the present invention. DESCRIPTION OF SYMBOLS 1... Antenna tuning circuit for long wave pad, 2... Antenna tuning circuit for medium wave band, S... Band changeover switch, Qlt Q2... First and second switching transistor, Dl... Variable capacitance diode.

Claims (2)

【実用新案登録請求の範囲】[Scope of utility model registration request] （１）第１のハンド用高周波同調回路と、第２のバンド
用高周波同調回路と、バンド切換スイッチと、該パッド
切換スイッチにてＯＮ、ＯＦＦ制御され第１のバンド受
信時前記第２のバンド用高周波同調回路を短絡する第１
のスイッチングトランジスタと、前記パッド切換スイッ
チにてＯＮ、ＯＦＦ制御され第２のバンド受信時前記第
１のハンド用高周波同調回路を短絡する第２のスイッチ
ングトランジスタと、前記第１のバンド用高周波同調回
路と前記第２のバンド用高周波同調回路との間に接続さ
れ前記第１第２の・□パッド用高周波同調回路に共用さ
れる可変容量ダイオードとを備えた複数バンドの電子同
調受信機であって、前記第１のバンド受信時前記第２の
スイッチングトランジスタの所定電極間に逆バイアス電
圧を印加する手段を設け、前記第２のスイッチングトラ
ンジスタの内部容量を減少させるようにしたことを特徴
とする複数バンドの電子同調受信機。(1) A first hand high-frequency tuning circuit, a second band high-frequency tuning circuit, a band changeover switch, and a pad changeover switch that are ON and OFF controlled to control the second band when the first band is received. The first short-circuiting the high frequency tuning circuit for
a second switching transistor that is ON/OFF controlled by the pad changeover switch and short-circuits the first hand high frequency tuning circuit when receiving a second band; and the first band high frequency tuning circuit. and a variable capacitance diode connected between the second band high frequency tuning circuit and shared by the first and second pad high frequency tuning circuits, , a means for applying a reverse bias voltage between predetermined electrodes of the second switching transistor when receiving the first band, thereby reducing an internal capacitance of the second switching transistor. Band electronically tuned receiver. （２）　　第１のバンドは中波バンド、第２のバンドは
長波バンドであることを特徴とする実用新案登録請求の
範囲第１項記載の複数バンドの電子同調受信機。(2) A multi-band electronic tuning receiver according to claim 1, wherein the first band is a medium wave band and the second band is a long wave band.
JP13847683U 1983-09-06 1983-09-06 Multi-band electronically tuned receiver Pending JPS6045529U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13847683U JPS6045529U (en) 1983-09-06 1983-09-06 Multi-band electronically tuned receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13847683U JPS6045529U (en) 1983-09-06 1983-09-06 Multi-band electronically tuned receiver

Publications (1)

Publication Number Publication Date
JPS6045529U true JPS6045529U (en) 1985-03-30

Family

ID=30310693

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13847683U Pending JPS6045529U (en) 1983-09-06 1983-09-06 Multi-band electronically tuned receiver

Country Status (1)

Country Link
JP (1) JPS6045529U (en)

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