Browse Prior Art Database

Switchable Low Voltage Current Source

IP.com Disclosure Number: IPCOM000040148D
Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2005-Feb-01

Publishing Venue

IBM

Related People

Authors:
Banker, DC Dorler, JA Hryckowian, JN [+details]

Abstract

Previously available low voltage current sources of either the common- emitter or resistor-emitter-type designs contain certain inherent disadvantages in high density logic chip applications, such as pipe sensitivity, tight device Vbe tracking requirements, and lack of switchability. This article describes a switchable low voltage current source which overcomes these disadvantages, saves on device count and offers improved performance. Fig.1 and 2 illustrate, respectively, generic current sources of the common emitter and the resistor emitter types.