A 67-GHz 1/4 static frequency divider using 0.2-mum self-aligned selective-
epitaxial-growth SiGe heterojunction bipolar transistors, with a 122-GHz cu
toff frequency, a 163-GHz maximum oscillation frequency, and an average emi
tter coupled logic gate delay time of 5.65 ps, was developed. The pretracki
ng master-slave toggle flip-flop OMS-TFF) of the divider increases the maxi
mum operating frequency to about 15% higher than that of a conventional MS-
TFF, yet the power consumption of the divider is 175 mW, which is 1/5 that
of comparable dividers, at a supply voltage of -5.2 V.