JPS60113510U - Physical quantity change detection device - Google Patents

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

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来のテープ終端位置検知装置の回路図、第２
図は本考案の実施例の回路図、第３図は　　　−第２図
の回路の動作波形図、第４図は本考案の他の実施例の回
路図、第５図は第４図の回路の動作　　　ゝ波形図であ
る。 主要部分の符号の説明、１・・・・・・磁気テープ、４
・・・・・・発光素子、５・・・・・・受光素子、８・
・・・・・レベルコノパレータ、１１・・・・・・レベ
ルシフトダイオード、１２・・・・・・時定数回路の抵
抗、１３・・・・・・時定数回路のコンデンサ。 −尾３図　　　　′ １．　苓５１２Ｎ′−Figure 1 is a circuit diagram of a conventional tape end position detection device;
The figure is a circuit diagram of an embodiment of the present invention, Figure 3 is an operating waveform diagram of the circuit of Figure 2, Figure 4 is a circuit diagram of another embodiment of the present invention, and Figure 5 is the circuit of Figure 4. This is a waveform diagram of the operation. Explanation of symbols of main parts, 1...Magnetic tape, 4
...... Light emitting element, 5... Light receiving element, 8.
... Level conoperator, 11 ... Level shift diode, 12 ... Time constant circuit resistor, 13 ... Time constant circuit capacitor. -Tail Figure 3' 1. 512N'-

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 所定物理量に応じた信号を遅延せしめる時定数回路と、
前記所定物理量に応じた信号と前記時定数回路の出力信
号との間に設定レベル差を付与するレベルシフト回路と
、このしさルシフト回路に゛　　　よりレベル差を付与
された両信号レベルを比較する比較回路ｙを有し、この
比較回路の出力を前記物理量の変化検知信号とするよう
にしたことを特徴とする物理量変化検知装置。a time constant circuit that delays a signal according to a predetermined physical quantity;
a level shift circuit that provides a set level difference between the signal corresponding to the predetermined physical quantity and the output signal of the time constant circuit; and a comparison that compares the levels of both signals to which the level difference is provided by the physical shift circuit. A physical quantity change detection device comprising a circuit y, the output of the comparison circuit being used as a change detection signal of the physical quantity.