JPS6019244U - AM/FM radio receiver - Google Patents
AM/FM radio receiverInfo
- Publication number
- JPS6019244U JPS6019244U JP11178883U JP11178883U JPS6019244U JP S6019244 U JPS6019244 U JP S6019244U JP 11178883 U JP11178883 U JP 11178883U JP 11178883 U JP11178883 U JP 11178883U JP S6019244 U JPS6019244 U JP S6019244U
- Authority
- JP
- Japan
- Prior art keywords
- receiving input
- turns
- pin diode
- weak
- coil
- 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
Links
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Circuits Of Receivers In General (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図および第２図はＡＧＣ電圧によって利得を制御す
る二つの異った従来の装置の構成を示すブロック図、第
３図は入力レベルと減衰量および歪の関係を表わすグラ
フ、第４図はアンテナ入力レベルとチューナ出力レベル
の関係を示すグラフ、第５図は本考案による高周波信号
減衰回路の回路図、第６図ａ、 ｂ、 ｃおよびｄ
はいろいろな受信入力レベルにおける本考案によるアン
テナ回路の等価回路図である。
１・・・アンテナ端子、２・・・・・・アンテナ同調回
路、３・・・高周波増幅器、４・・・高周波同調回路、
５・・・ミキサ／局部発振器、６・・・第１高周波増幅
段、７・・・ＡＧＣ用検比検出回路・・・次段に至るこ
とを表わす矢印、９・・・ＰＩＮアッテネータ、１０・
・・入力レベルの言数としての減衰量の変化を表わす曲
線、１１・・・入力レベルの関数としての歪の変化を表
わす曲線、１２・・・ＡＭチューナ部、１３・・・ミキ
サおよび第１中間周波増幅部、１４・・・オーディオ部
に至ることを表わす矢印、ＤＸ・・・ＰＩＮダイオード
、ＣＸ、。
Ｃｘ２・・・コンデンサ、Ｌｘ−・・ＡＭ雑音防止用コ
イル、ＱＸＩ、 Ｑｘ２＝ＮＰＮ トランジスタ、ＲＸ
Ｉ、 ＲＸ２． ＲＸ３・・・抵抗。
しの
１ −ｒ−１ヒｄ×１Figures 1 and 2 are block diagrams showing the configurations of two different conventional devices that control gain by AGC voltage, Figure 3 is a graph showing the relationship between input level, attenuation, and distortion, and Figure 4 is a graph showing the relationship between antenna input level and tuner output level, FIG. 5 is a circuit diagram of the high frequency signal attenuation circuit according to the present invention, and FIG. 6 is a, b, c, and d.
1 is an equivalent circuit diagram of an antenna circuit according to the present invention at various receiving input levels; FIG. 1... Antenna terminal, 2... Antenna tuning circuit, 3... High frequency amplifier, 4... High frequency tuning circuit,
5... Mixer/local oscillator, 6... First high frequency amplification stage, 7... AGC ratio detection circuit... Arrow indicating reaching the next stage, 9... PIN attenuator, 10...
...Curve representing the change in attenuation as a function of the input level, 11...Curve representing the change in distortion as a function of the input level, 12...AM tuner section, 13...Mixer and first Intermediate frequency amplification section, 14...arrow indicating connection to audio section, DX...PIN diode, CX. Cx2...Capacitor, Lx-...AM noise prevention coil, QXI, Qx2=NPN transistor, RX
I, RX2. RX3...Resistance. Shino1 -r-1 Hid x 1
Claims (2)
イオードを有し、ＦＭ受信時、上記ＰＩＮダイオードを
受信入力が強いときはオフ、受信入力が弱いときはオン
とするＡＧＣ回路を備えることを特徴とする受信機。(1) It is equipped with an AGC circuit that has a PIN diode connected in parallel with an AM noise prevention coil, and turns off the PIN diode when the receiving input is strong and turns on when the receiving input is weak during FM reception. Features receiver.
、弱いときオフするトランジスタによって駆動され、受
信入力が弱いとき、電流が上記トランジスタの負荷抵抗
、上記ＰＩ’Ｎダイオード、上記ＡＭ雑音防止用コイル
、ＦＭ混入防止用コイル、アンテナ同調コイル、および
ＡＭチュナ回路の抵抗を経てアースに流れることを特徴
とする実用新案登録請求の範囲第１項記載の受信機。(2) The PIN diode is driven by a transistor that turns on when the receiving input is strong and turns off when the receiving input is weak, and when the receiving input is weak, the current flows through the load resistance of the transistor, the PIN diode, the AM noise prevention coil, 2. The receiver according to claim 1, wherein the signal flows to ground through an FM mixing prevention coil, an antenna tuning coil, and a resistance of an AM tuner circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11178883U JPS6019244U (en) | 1983-07-19 | 1983-07-19 | AM/FM radio receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11178883U JPS6019244U (en) | 1983-07-19 | 1983-07-19 | AM/FM radio receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6019244U true JPS6019244U (en) | 1985-02-09 |
| JPH0124991Y2 JPH0124991Y2 (en) | 1989-07-27 |
Family
ID=30259407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11178883U Granted JPS6019244U (en) | 1983-07-19 | 1983-07-19 | AM/FM radio receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6019244U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04133916U (en) * | 1991-06-05 | 1992-12-14 | 河西工業株式会社 | Installation structure of escutcheon in door trim |
-
1983
- 1983-07-19 JP JP11178883U patent/JPS6019244U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04133916U (en) * | 1991-06-05 | 1992-12-14 | 河西工業株式会社 | Installation structure of escutcheon in door trim |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0124991Y2 (en) | 1989-07-27 |
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