JPS6032851U

JPS6032851U - AM-FM receiver

Info

Publication number: JPS6032851U
Application number: JP12402783U
Authority: JP
Inventors: 今川　敏幸
Original assignee: クラリオン株式会社
Priority date: 1983-08-10
Filing date: 1983-08-10
Publication date: 1985-03-06

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

[Brief explanation of drawings]

第１図は従来のＡＭ−ＦＭ受信機の一部の一部回路図を
含むブロック図、第２図は本考案によるＡＦ−ＦＭ受信
機の一部の一部回路図を含むブロック図、第３図はＳメ
ータ出力端子に現れる電圧をパラメータとして周波数と
減衰度の関係を示すダイヤグラム、第４図はマルチプレ
ックス・ステレオ復調器とアースの間のコンデンサの静
電容量をパラメータとして周波数と減衰度の関係を示す
ダイヤグラム、第５図はステレオおよびモノラルにおけ
るアンテナ入力とＳ／Ｎの関係を示すダイヤグラム、第
６図はＳメータ出力端子に現れる電圧とセパレーション
の関係を表わすダイヤグラムである。１・・・ＦＭチューナ、２・・・中間周波数増幅および
検波回路、３・・・ノイズ・キャンセラ、４・・・マル
チプレックス・ステレオ復調器、５・・・ＡＭチューナ
、中間周波数増幅および検波回路、６・・・オーディオ
回路に至ることを表わす矢印、７・・・定電圧回路、Ｒ
工〜Ｒ０・・・抵抗、Ｃ工〜Ｃ３＝　Ｃｓ、Ｃｏ・・・
電解コンデンサ、Ｃ４〜Ｃ７，Ｃ１ｏ〜Ｃ□２・・・マ
イラ・コンデンサ、Ｓ工・・・ＡＭ／ＦＭ切換えスイッ
チ、Ｄ□〜Ｄ６・・・ダイオード、Ｑ□ｑ　Ｑ２・・・
ＮＰＮトランジスタ、Ｖｃｃ・・・電源。、°−−−Ｔ＼一、Ｌ−］− １Ｄに周衰恢飼ｌ）FIG. 1 is a block diagram including a partial circuit diagram of a part of a conventional AM-FM receiver; FIG. 2 is a block diagram including a partial circuit diagram of a part of an AF-FM receiver according to the present invention; Figure 3 is a diagram showing the relationship between frequency and attenuation using the voltage appearing at the S meter output terminal as a parameter, and Figure 4 is a diagram showing the relationship between frequency and attenuation using the capacitance of the capacitor between the multiplex stereo demodulator and ground as a parameter. 5 is a diagram showing the relationship between the antenna input and S/N in stereo and monaural. FIG. 6 is a diagram showing the relationship between the voltage appearing at the S meter output terminal and separation. 1...FM tuner, 2...Intermediate frequency amplification and detection circuit, 3...Noise canceller, 4...Multiplex stereo demodulator, 5...AM tuner, intermediate frequency amplification and detection circuit , 6... Arrow indicating reaching the audio circuit, 7... Constant voltage circuit, R
Engineering ~ R0... Resistance, C Engineering ~ C3 = Cs, Co...
Electrolytic capacitor, C4-C7, C1o-C□2... Mylar capacitor, S engineering... AM/FM changeover switch, D□-D6... Diode, Q□q Q2...
NPN transistor, Vcc...power supply. , °---T\ 1, L-]- 1D is modified

Claims

[Scope of Claim for Utility Model Registration] The S terminal of the FM intermediate frequency amplification and detection circuit is connected to the high frequency cut control terminal of the FM multiplex demodulation circuit. - An AM-FM receiver characterized in that both the AGC output terminal of the AM circuit and the AGC output terminal of the AM circuit are connected to automatically reduce high frequency band noise due to a weak input signal.