JPS5920420U

JPS5920420U - noise canceller

Info

Publication number: JPS5920420U
Application number: JP11694682U
Authority: JP
Inventors: 史郎鈴木
Original assignee: 三洋電機株式会社
Priority date: 1982-07-30
Filing date: 1982-07-30
Publication date: 1984-02-07

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図は従来のノイズキャンセラの回路ブロック図、第
２図イ１口は夫々、異なるＩＨ遅延線の通過帯域特性図
、第３図及び第４図は本考案のノイズキャンセラの夫々
、異なる実施例を示す回路ブロック図である。主な図番の説明、２，７・・・第１、第２ＦＭ復調器、
３．　８．　１２・・・第１、第２、第３ＬＰＦ、　６
・・・ＩＨ遅延線、４．５・・・第１、第２混合回路、
１０・・・リミッタ。Fig. 1 is a circuit block diagram of a conventional noise canceler, Fig. 2 A is a passband characteristic diagram of different IH delay lines, and Figs. It is a circuit block diagram showing. Explanation of main figure numbers, 2, 7... first and second FM demodulators,
3. 8. 12...first, second, third LPF, 6
...IH delay line, 4.5...first and second mixing circuit,
10...Limiter.

Claims

[Scope of utility model registration request]

a first FM demodulator that demodulates the reproduced FM signal; and a first FM demodulator that demodulates the reproduced FM signal;
an IH delay line that delays the M signal by one horizontal period, a second FM demodulator that demodulates the output of the delay line, and a first subtraction circuit that subtracts the second demodulator output from the first demodulator output; and a second subtraction circuit that subtracts the output of the first subtraction circuit from the output of the first FM demodulator,
A low-pass filter is arranged in a path in which the output of the first FM demodulator is supplied to the first subtraction circuit or in a path in which the output of the first subtraction circuit is supplied to the second subtraction circuit. Noise canceller.