JPS59104641U

JPS59104641U - FM tuner

Info

Publication number: JPS59104641U
Application number: JP20153182U
Authority: JP
Inventors: 実吉岡
Original assignee: パイオニア株式会社
Priority date: 1982-12-28
Filing date: 1982-12-28
Publication date: 1984-07-14

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 the drawing]

第１図は従来のＦＭチューナにおけるＳ／Ｎ改善を示す
回路図、第２図はこの考案によるＦＭチューナの一実施
例を示す回路図、第３図ａ、　　ｂは第２図に示すＦＭ
検波部の特性図である。１．１１・・・フロントエンド部、６．　１２・・・中
間周波増幅部、７．１３・・・ＦＭ検波部、８・・・マ
ルチプレックス復調部、９．　９’・・・ディエンファ
シス回路、１０・・・出力端、１４・・・ダミーアンテ
ナ。化カ出力！（ｚ）Fig. 1 is a circuit diagram showing S/N improvement in a conventional FM tuner, Fig. 2 is a circuit diagram showing an embodiment of the FM tuner according to this invention, and Figs. 3a and b are FM tuners shown in Fig. 2.
It is a characteristic diagram of a detection part. 1.11...Front end section, 6. 12... Intermediate frequency amplification section, 7.13... FM detection section, 8... Multiplex demodulation section, 9. 9'... De-emphasis circuit, 10... Output end, 14... Dummy antenna. Power output! (z)

Claims

[Scope of utility model registration request]

a front end section that converts the FM modulation signal into an audio signal; and a first section that detects the output of this front end section.
FM detection section, a second front end section inputting the dummy antenna signal, detecting the output of this first front end section, and detecting the figure 8 characteristic of the first FM detection section. An FM tuner comprising a second FM detection section having a figure-8 characteristic of opposite polarity, and a multiplex demodulation section that receives as input a composite signal of the outputs of the second FM detection section and the first FM detection section. .