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

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

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A frequency divider with super-dynamic D-type flip–flop is demonstrated in 2 µm GaInP/GaAs HBT (  fT = 40 GHz) technology. By biasing the HBT devices around the peak transit-time frequency (  fT), the operating frequency of a D-FF 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.

References

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      • Y. Kuriyama , T. Sugiyama , S. Hongo , K. Akagi , K. Tsuda , N. Iizuka , M. Obara . A 40-GHz D-type flip–flop using AlGaAs/GaAs HBT's. IEEE J. Solid-State Circuits , 10 , 1128 - 1130
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