DESIGN AND ANALYSIS OF A HIGH-SPEED GAAS COMPARATOR-CIRCUIT

A high-speed GaAs comparator with low power-consumption and a small ar ea has been designed and simulated with a dynamic range of +/- 580 mV. It is intended for applications in high-speed A/D conversion and arti ficial neural networks. It dissipates 3.1 mW for a single 2 V supply a nd has been simulated at 1 GHz. An analysis of the comparator to deter mine the effects of threshold deviations on the resolution was underta ken. The sizing of devices is chosen to minimize the susceptibility to threshold deviations while maintaining optimum performance.