Multi-collector ECL circuit family and its application to 1 GHz prescaler IC

This paper describes a newly proposed Emitter Coupled Logic (ECL) circuit family named Collector Function Logic (CFL). The configuration saves chip area without performance degradation. A divide-by-256, 1 GHz prescaler IC has been developed as an application of the CFL configuration. Two hundred forty mW power consumption (at Vcc= 5V) r 1.2 GHz toggle frequency and a 1.11 × 1.30mm chip arear which is smaller by about 30 % in comparison with a conventional ECL structures are achieved by this IC.