JPS5936638U - Radio receiver tuning sensitivity setting circuit - Google Patents

Radio receiver tuning sensitivity setting circuit

Info

Publication number
JPS5936638U
JPS5936638U JP13008782U JP13008782U JPS5936638U JP S5936638 U JPS5936638 U JP S5936638U JP 13008782 U JP13008782 U JP 13008782U JP 13008782 U JP13008782 U JP 13008782U JP S5936638 U JPS5936638 U JP S5936638U
Authority
JP
Japan
Prior art keywords
sensitivity setting
gate
setting circuit
radio receiver
tuning sensitivity
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
JP13008782U
Other languages
Japanese (ja)
Other versions
JPH0110030Y2 (en
Inventor
晃司 山下
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP13008782U priority Critical patent/JPS5936638U/en
Publication of JPS5936638U publication Critical patent/JPS5936638U/en
Application granted granted Critical
Publication of JPH0110030Y2 publication Critical patent/JPH0110030Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Control Of Amplification And Gain Control (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図は本考案に係る同調感度設定回路を備えたラジオ
受信機の要部を示す電気的結線図、第２図はＦＥＴのゲ
ート電圧とソース電圧との電位差と電力利得の関係を示
す特性線図、第３図は本考案の同調感度設定回路の他の
実施例を備えたラジオ受信機の要部を示す電気的結線図
である。 １：アンテナ入力端子、２．ＦＥＴＸＧ１．　ｃ２：第
１、第２のゲート、Ｄニドレーン、Ｓ：ソース、ｖＯＬ
：可変抵抗器、ＳＷ：切換スイッチ。Fig. 1 is an electrical wiring diagram showing the main parts of a radio receiver equipped with a tuning sensitivity setting circuit according to the present invention, and Fig. 2 is a characteristic showing the relationship between the potential difference between the gate voltage and source voltage of the FET and the power gain. FIG. 3 is an electrical wiring diagram showing the main parts of a radio receiver equipped with another embodiment of the tuning sensitivity setting circuit of the present invention. 1: Antenna input terminal, 2. FETXG1. c2: first and second gates, D drain, S: source, vOL
: Variable resistor, SW: Changeover switch.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] アンテナ入力信号が入力されるアンテナ入力回路中にデ
ュアルゲートのＦＥＴを設け、該ＦＥＴの第１のゲート
に上記アンテナ入力信号を入力させると共に第２のゲー
トに感度設定器を介して定電圧源を接続して上記第２の
ゲートのゲート電圧を上記感度設定器によりＤＣ制御す
るべく成し、上゛　　記ＦＥＴのドレーンより感度制御
したアンテナ入力信号を出力する構成とした事を特徴と
するラジオ受信機の同調感度設定回路。A dual-gate FET is provided in the antenna input circuit into which the antenna input signal is input, and the antenna input signal is input to the first gate of the FET, and a constant voltage source is connected to the second gate via a sensitivity setting device. The radio reception is characterized in that the gate voltage of the second gate is DC-controlled by the sensitivity setting device, and the sensitivity-controlled antenna input signal is output from the drain of the FET. Machine tuning sensitivity setting circuit.
JP13008782U 1982-08-27 1982-08-27 Radio receiver tuning sensitivity setting circuit Granted JPS5936638U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13008782U JPS5936638U (en) 1982-08-27 1982-08-27 Radio receiver tuning sensitivity setting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13008782U JPS5936638U (en) 1982-08-27 1982-08-27 Radio receiver tuning sensitivity setting circuit

Publications (2)

Publication Number Publication Date
JPS5936638U true JPS5936638U (en) 1984-03-07
JPH0110030Y2 JPH0110030Y2 (en) 1989-03-22

Family

ID=30294550

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13008782U Granted JPS5936638U (en) 1982-08-27 1982-08-27 Radio receiver tuning sensitivity setting circuit

Country Status (1)

Country Link
JP (1) JPS5936638U (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5547716A (en) * 1978-07-27 1980-04-04 Texas Instruments Deutschland High frequency amplifier

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5547716A (en) * 1978-07-27 1980-04-04 Texas Instruments Deutschland High frequency amplifier

Also Published As

Publication number Publication date
JPH0110030Y2 (en) 1989-03-22

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