JPS58186640U - TV tuner for wideband reception - Google Patents

TV tuner for wideband reception

Info

Publication number
JPS58186640U
JPS58186640U JP1982085105U JP8510582U JPS58186640U JP S58186640 U JPS58186640 U JP S58186640U JP 1982085105 U JP1982085105 U JP 1982085105U JP 8510582 U JP8510582 U JP 8510582U JP S58186640 U JPS58186640 U JP S58186640U
Authority
JP
Japan
Prior art keywords
tuner
reception
wideband reception
band
high frequency
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.)
Granted
Application number
JP1982085105U
Other languages
Japanese (ja)
Other versions
JPH0132433Y2 (en
Inventor
松浦　修二
Original Assignee
シャープ株式会社
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 シャープ株式会社 filed Critical シャープ株式会社
Priority to JP1982085105U priority Critical patent/JPS58186640U/en
Publication of JPS58186640U publication Critical patent/JPS58186640U/en
Application granted granted Critical
Publication of JPH0132433Y2 publication Critical patent/JPH0132433Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (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図は本考案のテレビチューナの１実施例の回路図、
第２図は同実施例におけるハイバンド受信時の等価回路
図、第３図は同ミドルバンド及びローバンド受信時の等
価回路図、第４図は同実施例における高周波増幅回路の
電力利得特性線図である。 Ｔｒｌ・・・高周波増幅用トランジスタ、Ｔｒ２．　Ｔ
ｒ３・・・混合用トランジスタ、Ｃ工、・・・結合コン
デンサ、Ｃ□２・・・カップリング用コンデンサ、Ｃ□
３・・・補正用コンデンサ、Ｄｌｏ・・・バンド切換用
ダイオード、Ｄ１□。 Ｄ１□・・・ＤＣ切換用ダイオード、ＧＳＷ・・・利得
切換回路。FIG. 1 is a circuit diagram of one embodiment of the television tuner of the present invention.
Fig. 2 is an equivalent circuit diagram for high-band reception in the same embodiment, Fig. 3 is an equivalent circuit diagram for middle-band and low-band reception, and Fig. 4 is a power gain characteristic diagram of the high-frequency amplifier circuit in the same embodiment. It is. Trl... High frequency amplification transistor, Tr2. T
r3...Mixing transistor, C engineering,...Coupling capacitor, C□2...Coupling capacitor, C□
3... Correction capacitor, Dlo... Band switching diode, D1□. D1□...DC switching diode, GSW...gain switching circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 高周波増幅回路と混合回路との間に、バンド切換用ダイ
オード及び補正用コンデンサ等を含む利得切換回路を挿
入してなり、受信バンドに応じて高周波増幅回路の利得
を切換えるようにしたことを特徴とする広帯域受信用テ
レビチューナ。A gain switching circuit including a band switching diode, a correction capacitor, etc. is inserted between the high frequency amplifier circuit and the mixing circuit, and the gain of the high frequency amplifier circuit is switched according to the reception band. TV tuner for wideband reception.
JP1982085105U 1982-06-07 1982-06-07 TV tuner for wideband reception Granted JPS58186640U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1982085105U JPS58186640U (en) 1982-06-07 1982-06-07 TV tuner for wideband reception

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1982085105U JPS58186640U (en) 1982-06-07 1982-06-07 TV tuner for wideband reception

Publications (2)

Publication Number Publication Date
JPS58186640U true JPS58186640U (en) 1983-12-12
JPH0132433Y2 JPH0132433Y2 (en) 1989-10-04

Family

ID=30094016

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1982085105U Granted JPS58186640U (en) 1982-06-07 1982-06-07 TV tuner for wideband reception

Country Status (1)

Country Link
JP (1) JPS58186640U (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5233782U (en) * 1975-08-30 1977-03-09
JPS55150626A (en) * 1979-05-14 1980-11-22 Fujitsu Ten Ltd Capacitive antenna input circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5233782U (en) * 1975-08-30 1977-03-09
JPS55150626A (en) * 1979-05-14 1980-11-22 Fujitsu Ten Ltd Capacitive antenna input circuit

Also Published As

Publication number Publication date
JPH0132433Y2 (en) 1989-10-04

Similar Documents

Publication Publication Date Title
JPS58186640U (en) TV tuner for wideband reception
JPS59154946U (en) RF amplifier circuit of VHF tuner
JPS5837242U (en) receiving circuit
JPS60149258U (en) tuner circuit
JPS60192504U (en) antenna device
JPS5899946U (en) front end circuit
JPS58121442U (en) radio receiver
JPS58169744U (en) VHF tuner input tuning circuit
JPS5857141U (en) tuner mixing circuit
JPS59171438U (en) UHF-VHF combination electronic tuner
JPS6074292U (en) Tape recorder with radio receiver
JPS58138437U (en) portable radio receiver
JPS5857163U (en) television signal receiver
JPS59174748U (en) TV tuner circuit
JPS58141642U (en) AM radio receiver
JPS59129241U (en) VHF tuner coupling circuit
JPS60121342U (en) tuner output circuit
JPS59134953U (en) antenna input tuning circuit
JPS61319U (en) Receiver automatic gain control circuit
JPS6088618U (en) power amplifier device
JPS5834448U (en) Intermediate frequency bandwidth switching circuit
JPS58176419U (en) AGC circuit in TV receiver
JPS601057U (en) CATV converter
JPS5996918U (en) High frequency amplifier circuit
JPS60150839U (en) AM receiver