GaAs digital integrated circuits for very high-speed frequency division

Dual- and single-clocked frequency dividers, consisting of normally-on GaAs MESFET integrated circuits, with maximum toggle frequency of 5.7 GHz, were fabricated. The gate length was 0.8 ?m and an E-beam direct writing processing technology was used. Some improvements, such as reduction of the gate length and adoption of a double pinchoff voltage technology, would make possible the implementation of a counter family with a maximum operating frequency in the range 5?7 GHz.