NTL with complementary emitter-follower driver: a high-speed low-power push-pull logic circuit

A high-speed low-power nonthreshold-logic (NTL)-based push-pull logic circuit, featuring a complementary emitter-follower driver is presented. Compared with the standard NTL circuit, the circuit offers a much better balance between the pull-up and pull-down delay, improved scalability, and superior load driving capability. Simulation results based on a 0.8- mu m double-poly. self-aligned complementary bipolar technology indicate that at a power consumption of 1.22 mW/gate, the circuit offers 2.4* improvement in the pull-down delay of a loaded gate and 4.0* improvement in the load driving capability over the standard NTL circuit. The design and scaling considerations of the circuit are discussed.<
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