JPS59189709U

JPS59189709U - Dropout compensation circuit

Info

Publication number: JPS59189709U
Application number: JP8247283U
Authority: JP
Inventors: 克典三浦
Original assignee: 三洋電機株式会社
Priority date: 1983-05-30
Filing date: 1983-05-30
Publication date: 1984-12-15

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図は従来のドロップアウト補償回路ブロック図、第
２図は同要部波形説明図、第３図は、本考案の一実施例
に係るドロップアウト補償回路ブロック図、第４図は同
要部波形説明図をそれぞれ示す。主な図番の説明、２・・・ドロップアウト検出回路、５
・・・モノマルチ、６・・・遅延回路、３・・・ＦＭ復
調回路、４・・・前置保持回路。FIG. 1 is a block diagram of a conventional dropout compensation circuit, FIG. 2 is a waveform explanatory diagram of the same main part, FIG. 3 is a block diagram of a dropout compensation circuit according to an embodiment of the present invention, and FIG. 4 is a diagram of the same main part. Figure 3 shows an explanatory diagram of each part waveform. Explanation of main drawing numbers, 2...Dropout detection circuit, 5
... Mono multi, 6... Delay circuit, 3... FM demodulation circuit, 4... Pre-hold circuit.

Claims

[Scope of utility model registration request]

An FM demodulation circuit that has a low-pass filter in its output stage and demodulates the reproduced FM modulation signal, a pre-hold circuit that follows the FM demodulation circuit and holds the FM demodulation output in advance during the switching signal input period, and a drop of the reproduced FM modulation signal. a dropout detection circuit that detects dropout detection, a mono-multi circuit that is triggered by the fall of the dropout detection output and sets the metastable period to be longer than the delay period of the low-pass filter, and a dropout detection circuit that sets the dropout detection output to a range below the metastable period. and an OR circuit that supplies an OR output of a dropout detection output, a mono multi-output, and a delay circuit output to the prehold circuit.