JPS604957U

JPS604957U - Rotation speed detection circuit

Info

Publication number: JPS604957U
Application number: JP9821783U
Authority: JP
Inventors: 大河　喜由; 松村　政美
Original assignee: 三菱電機株式会社
Priority date: 1983-06-23
Filing date: 1983-06-23
Publication date: 1985-01-14

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図はこの考案の一実施例による回転数検出回転の回
路構成図、第２図は第１図の回転数検出出力の特性図、
第３図は第１図要部の動作を示す動作波形図である。２・・・定デユーティパルス回路、２０Ｔ、７・・・Ｄ
タイプフリップフロップ、２０４・・・オペアンプ、２
０７・・・コンデンサ、２０δ、３１．４１・・・コン
パレータ、３．４・・・コンパレータ回路、５・・・ア
ンド回路、６・・・インバータ回路。なお、図中、同一
符号は同一部分又は相当部分を示す。補正　昭５９．　４．　４実用新案登録請求の範囲を次のように補正する。Ｏ実用新案登録請求の範囲（１）回転に同期して定デユーティパルスを発生する定
デ五−テイパルス回路と、上記定デユーティパルス回路
の出力電圧がハイレベルの間に定電流放電され、またロ
ーレベルの間に定電流充電されるコンデンサと、検出す
べき回転数に対応する比較電圧を有する少なくとも１つ
以上のコンパレータ回路と、上記定デユーティパルス回
路の出力を入力すると共に、上記コンパレータ回路の出
力もしくは該コンパレータ回路の出力を所定の論理回路
を介して入力するフリップフロップとを備え、上記コン
デンサの端子電圧−を上記コンパレータ回路で比較し、
上記定デユーティパルスの立上りに同期して上記フリッ
プフロップの出力端子に上記フリップフロップのデータ
端子の電圧レベルを出力するようにしたことを特徴とす
る回転数検出回路。（２）上記フリップフロップはＤタイプフリップフロッ
プとし、データ端子には上記コンパレータ回路の出力を
、クロック端子には上記定デユーティパルス回路の出力
を入力することを特徴とする実用新案登録請求の範囲第
１項記載の回転数検出回路。FIG. 1 is a circuit configuration diagram of the rotation speed detection rotation according to an embodiment of this invention, FIG. 2 is a characteristic diagram of the rotation speed detection output of FIG. 1,
FIG. 3 is an operation waveform diagram showing the operation of the main part of FIG. 1. 2... Constant duty pulse circuit, 20T, 7...D
Type flip-flop, 204... operational amplifier, 2
07... Capacitor, 20δ, 31.41... Comparator, 3.4... Comparator circuit, 5... AND circuit, 6... Inverter circuit. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Correction 1982. 4. 4. The scope of claims for utility model registration shall be amended as follows. Utility Model Registration Claims (1) A constant duty pulse circuit that generates a constant duty pulse in synchronization with rotation, and a constant current discharged while the output voltage of the constant duty pulse circuit is at a high level, Further, a capacitor that is charged with a constant current during the low level, at least one comparator circuit having a comparison voltage corresponding to the rotation speed to be detected, and the output of the constant duty pulse circuit are inputted, and the comparator circuit a flip-flop that inputs the output of the circuit or the output of the comparator circuit via a predetermined logic circuit, and compares the terminal voltage of the capacitor with the comparator circuit;
The rotation speed detection circuit is characterized in that the voltage level of the data terminal of the flip-flop is outputted to the output terminal of the flip-flop in synchronization with the rise of the constant duty pulse. (2) Claims for registration of a utility model characterized in that the flip-flop is a D-type flip-flop, and the output of the comparator circuit is input to the data terminal, and the output of the constant duty pulse circuit is input to the clock terminal. The rotation speed detection circuit according to item 1.

Claims

[Scope of utility model registration request]

(1) A constant duty pulse circuit that generates constant duty pulses in synchronization with the rotation, and a constant current discharge when the output voltage of the constant duty pulse circuit is high level 9, and a constant current discharge while low level. A capacitor to be charged, at least one comparator circuit having a comparison voltage corresponding to the rotation speed to be detected, and the output of the constant duty pulse circuit are inputted, and the output of the comparator circuit or the comparator circuit is and a flip-flop whose output is input through a predetermined logic circuit, the terminal voltage of the capacitor is compared with the comparator circuit, and the data is sent to the output terminal of the flip-flop in synchronization with the rise of the constant duty pulse. A rotation speed detection circuit characterized by outputting the voltage level of a terminal.

(2) The scope of the utility model registration claim characterized in that the flip-flop is a D-type flip-flop, the output of the comparator circuit is input to the data terminal, and the output of the constant duty pulse circuit is input to the clock terminal. The rotation speed detection circuit according to item 1.