Title :
Self-biased feedback-controlled pull-down emitter follower for high-speed low-power bipolar logic circuits
Author_Institution :
IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA
Abstract :
The self-biased, feedback-controlled, active-pull-down emitter follower is a very efficient and superior circuit applicable to high-speed low-power bipolar/BiCMOS digital VLSIs. The circuit is effective because the biasing, inverting, level-shifting, and coupling functions are simply merged into a small number of devices and is versatile for logic implementations because it does not need any extra out-of-phase signal from the logic stage, allowing the collector-dotting and emitter-dotting. The push-pull operation of this novel circuit is precisely controlled by a feedback mechanism and results in a remarkable performance enhancement: 2.7x typical simulated pull-down speed and 10x drive capability over the conventional RPD-ECL.
Keywords :
BiCMOS integrated circuits; VLSI; bipolar integrated circuits; digital integrated circuits; feedback; integrated logic circuits; BiCMOS digital circuits; VLSI; bipolar logic circuits; feedback control; high-speed operation; low-power operation; pull-down emitter follower; self-biased circuit; BiCMOS integrated circuits; Bipolar transistor logic devices; Digital integrated circuits; Feedback circuits; High-speed integrated circuits; Very-large-scale integration;
Conference_Titel :
VLSI Circuits, 1993. Digest of Technical Papers. 1993 Symposium on
Conference_Location :
Kyoto, Japan
DOI :
10.1109/VLSIC.1993.920523
