Advanced ECL with new active pull-down emitter-followers

Abstract
Approaches to high-speed and high-load driving capability of bipolar logic gates are discussed. Several circuits are investigated. It is shown that the Emitter Coupled Logic (ECL) with FET pull-down emitter-followers has a 3-5 times greater capability of driving capacitive loads than the conventional one. The performance improvement is drastically enhanced when applied to GaAs LSIs Author(s) Itoh, H. Hitachi Ltd., Tokyo, Japan Saitoh, T. ; Yamada, T. ; Yamamoto, M. ; Masaki, A.

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