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Function Generator

IP.com Disclosure Number: IPCOM000085396D
Original Publication Date: 1976-Apr-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Frankeny, JA: AUTHOR [+3]

Abstract

Small instantaneous motor speed variations are caused by opens resulting from a sliding motion of a linear potentiometer. These variations are overcome with a function generator circuit having a capacitor connected across its operational amplifier.

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Function Generator

Small instantaneous motor speed variations are caused by opens resulting from a sliding motion of a linear potentiometer. These variations are overcome with a function generator circuit having a capacitor connected across its operational amplifier.

When an open occurs in potentiometer R3, Vf will change rapidly. This will cause a change in the motor speed. Capacitor C1, connected across the amplifier from the plus input to the output, will hold the instantaneous voltage on the potentiometer R3. This capacitor will provide the circuit with the ability to null out openings in potentiometer R3.

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