Browse Prior Art Database

Driver Circuit

IP.com Disclosure Number: IPCOM000061542D
Original Publication Date: 1986-Aug-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Gaudenzi, GJ: AUTHOR [+3]

Abstract

This article discloses a dottable emitter follower driver which maximizes the output voltage swing while maintaining both a high current drive capability and a power supply environment of 5 V Å 10%. This feature enhances the DC of chip wiring rules. The circuit employs a lateral PNP transistor Q1. When Q1 is on, transistor Q3 is off, thus insuring sufficient drive into the base of transistor Q4. Transistor Q2 controls the bias on the base of Q1, and resistance values for R1 and R2 are chosen so as to set the DC currents through Q1. Transistor Q3 is used to obtain active discharge on the base of transistor Q4.

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Driver Circuit

This article discloses a dottable emitter follower driver which maximizes the output voltage swing while maintaining both a high current drive capability and a power supply environment of 5 V Å 10%. This feature enhances the DC of chip wiring rules. The circuit employs a lateral PNP transistor Q1. When Q1 is on, transistor Q3 is off, thus insuring sufficient drive into the base of transistor Q4. Transistor Q2 controls the bias on the base of Q1, and resistance values for R1 and R2 are chosen so as to set the DC currents through Q1. Transistor Q3 is used to obtain active discharge on the base of transistor Q4.

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