Browse Prior Art Database

SELF-POWERED TACHOMETER CIRCUIT

IP.com Disclosure Number: IPCOM000005500D
Original Publication Date: 1983-Mar-01
Included in the Prior Art Database: 2001-Oct-10
Document File: 2 page(s) / 60K

Publishing Venue

Motorola

Related People

Authors:
Robert W. Deutsch

Abstract

A tachometer circuit which derives its power from the signal it is monitoring is shown below. It is particularly suited for measuring engine velocity and acceleration, but may be used to monitor and filter noisy, repetitious waveforms so that the signal switching frequency may be determined accurate- ly. In normal use it may be connected to the primary side of an automobile ignition coil which is being controlled electronically or mechanically.