Abstract

A new CML-type monostable/bistable logic element IC is fabricated using monolithically integrated resonant tunnelling diodes (RTDs) and InP/InGaAs heterojunction bipolar transistors (HBTs). The D-flip-flop function of the fabricated circuit is confirmed up to 20 Gbit/s at room temperature. This result indicates the potential of the RTD/HBT technology for high-speed logic applications.

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