Diode-HBT-logic circuits monolithically integrable with ECL/CML circuits

A description is provided of a novel logic approach, diode-HBT-logic (DHL), that is implemented with GaAlAs-GaAs HBTs and Schottky diodes to provide high density and low power digital circuit operation. This logic family has been realized with the same technology used to produce ECL/CML circuits. The logic operation is demonstrated with a ring oscillator, consisting of 19 stages of bilevel DHL gates. A gate delay of 160 ps was measured with 1.1 mW of power per gate. Layouts of a DHL flip-flop and divider have shown that circuit area and transistor count can be reduced by about a factor of 3, relative to ECL/CML circuits.<
>