JPS59194156U

JPS59194156U - Track interval detection device in record player

Info

Publication number: JPS59194156U
Application number: JP8600083U
Authority: JP
Inventors: 山下　幸寛
Original assignee: パイオニア株式会社
Priority date: 1983-06-06
Filing date: 1983-06-06
Publication date: 1984-12-24

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図は従来例を示す回路図、第２図は本考案の一実施
例を示す回路図、第３図ａはレコード盤の断面図、第３
図すはかかるレコード盤面上を移動したときの光学セン
サの出力波形図、第３図Ｃは第２図におけるワンショッ
トマルチの出力波形図、第４図は本考案の他の実施例を
示す回路図である。主要部分の符号の説明、１・・・光学センサ、４゜６・
・・コンパレータ、７・・・ワンショットマルチ、８・
・・アナログスイッチ、９・・・ピークホールド回路、
１０・・・基準レベル設定回路、１１・・・可変利得型
アンプ。Fig. 1 is a circuit diagram showing a conventional example, Fig. 2 is a circuit diagram showing an embodiment of the present invention, Fig. 3a is a sectional view of a record disc,
The figure is a diagram of the output waveform of the optical sensor when moving on the record surface, Figure 3C is the output waveform of the one-shot multi in Figure 2, and Figure 4 is a circuit showing another embodiment of the present invention. It is a diagram. Explanation of symbols of main parts, 1... Optical sensor, 4゜6・
... Comparator, 7... One-shot multi, 8.
...Analog switch, 9...Peak hold circuit,
10... Reference level setting circuit, 11... Variable gain type amplifier.

Claims

[Scope of utility model registration request]

A track interval detection device for a record player, comprising an optical sensor that moves on the record surface, and a comparator that generates a track interval signal when the output level of the optical sensor exceeds a predetermined reference level. a level detection circuit that detects the output level of the optical sensor at a predetermined position; and a level adjustment that automatically adjusts the relative level between the output level of the optical sensor and the reference level based on the detection level of the level detection circuit. A track interval detection device in a record player, characterized by comprising a circuit.