A low-power fully differential 2.4-GHz prescaler in 0.18 /spl mu/m CMOS technology

A fully differential 2.4-GHz 8/9 dual modulus prescaler is presented in this paper. The circuit has been constructed in a 0.18 /spl mu/m 1.8 V CMOS process for use in a low-power ISM transceiver. The prescaler consists of internal buffering, the divider itself, a differential to CMOS converter, and a self-contained current source. Simulations imply a maximum operating frequency of 3.05 GHz which is the measurement of the silicon support. Its simulated current drain is 2.5 mA and it occupies an area of 130 /spl mu/m /spl times/ 60 /spl mu/m.