The Letter describes the first experimental result of a high-speed low-power ECL-based AC-coupled complementary push-pull circuit. Implemented in a 0.8 μm high-performance fully complementary bipolar technology with 50 GHz npn transistor and 13 GHz pnp transistor, a power-delay product of 340J (23.2ps at 1.48mW) has been achieved compared with 67fJ (45ps at 1.48mW) for the npn-only ECL circuit.
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Chuang et al. (1993) studied this question.