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LATERAL TRANSISTOR CURRENT SENSING THAT COMPENSATES FOR EARLY VOLTAGE

IP.com Disclosure Number: IPCOM000006738D
Original Publication Date: 1993-Mar-01
Included in the Prior Art Database: 2002-Jan-28

Publishing Venue

Motorola

Related People

Authors:
Tom Petty Bob Vyne Renwin Yee

Abstract

SENSE cur Transistors Ql and Q2 shown in the above sche- matic are the output devices of an operational amplifier that is capable of a large dynamic output voltage swing. The function of the remaining circuitry is to accurately reproduce a fraction (l/N) of the amplier's output cur- rent (Iout) at the SENSE OUT terminal. The current Isense must be independent of the voltage which appears at the SENSE OUT terminal.