9.5 GHz GaInP/GaAs HBT divide-by-two frequency divider using super-dynamic D-type flip-flop technique

Abstract

A frequency divider with super-dynamic D-type flip-flop is demonstrated in 2 mu m GaInP/GaAs HBT (f(T) = 40 GHz) technology. By biasing the HBT devices around the peak transit-time frequency (f(T)), the operating frequency of a D-FT with ECNFP (emitter-coupled negative feedback pairs) can be improved. At a supply voltage of 5 V a divide-by-two function of 9.5 GHz is achieved.