VERY-HIGH-SPEED SI BIPOLAR STATIC FREQUENCY-DIVIDERS WITH NEW T-TYPE FLIP-FLOPS

This paper presents two circuit techniques for highspeed operation of a master slave toggle flip-flop circuit (MS-TFF). One circuit reduces the gain in latching circuits, and the other uses the transient curren t of the emitter followers to boost the switching speed. Both the SPIC E simulations and the measured results for static 1/8 frequency divide rs fabricated using 0.5-mu m super self-aligned process technology (SS T1C) show that the maximum operating speed of our MS-TFF's is 10% and 30% faster than that of conventional ones. By applying these technolog ies, 19.1-GHz and 22.4-GHz Si bipolar static frequency dividers have b een fabricated.