GaAs digital arithmetic subsystem for high data-rate signal processing

A high-speed, low-power GaAs digital arithmetic subsystem has been developed which performs 8-bit arithmetic and logic functions required for signal processing. The subsystem integrates seven GaAs integrated circuits, including an 8*8-bit multiplier/accumulator, two 4-bit arithmetic logic units, three logical multiplexers, and a logical demultiplexer, using a commercially available prototype board. The subsystem operates at a clock rate as high as 325 MHz, the maximum clock rate of the multiplier, with a delay of 9.6 ns. The power dissipation of the subsystem is 1.4 W, excluding output driver power, at a power supply voltage of 1.4 V.<>