Browse Prior Art Database

Current Switch Emitter Follower with Fast Out Of Phase Transition

IP.com Disclosure Number: IPCOM000085831D
Original Publication Date: 1976-Jun-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Varadarajan, HD: AUTHOR

Abstract

The out-of-phase output of a current switch emitter-follower is slow because of high gain and the Miller effect.

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Current Switch Emitter Follower with Fast Out Of Phase Transition

The out-of-phase output of a current switch emitter-follower is slow because of high gain and the Miller effect.

Adding a cascode transistor T1 whose base is returned to a local reference (Vbe) changes the gain at T2's collector to unity and nullifies the Miller effect.

The current switch now has symmetrical transitions at both outputs while retaining standard logic levels.

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