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AN IMPROVED TOLERANCE MULTIPLE Vbe VOLTAGE REFERENCE

IP.com Disclosure Number: IPCOM000005554D
Original Publication Date: 1985-Oct-01
Included in the Prior Art Database: 2001-Oct-15
Document File: 1 page(s) / 64K

Publishing Venue

Motorola

Related People

Authors:
Robert B. Jarrett

Abstract

Voltage references of one form or another exist in all integrated circuits. These references may be extremely simple or quite complex. Examples of simple voltage references include the base to emitter voltage drop (Vbe) in a Bipolar IC or the Vth in a MOS device. Zener diodes are frequently used reference elements providing stability and high initial tolerance. Where the requirements for a voltage reference include temperature stability and tight tolerance initial value, bandgap references tend to be the configuration of choice. Bandgaps are the only choice if the reference value is to be less than that obtainable in a zener diode.