FAST CMOS NONBINARY DIVIDER AND COUNTER

A new kind of nonbinary CMOS divider and counter is presented. The div ider directly gives a nonbinary dividing ratio without any decoder and , therefore, no speed degradation. They can be directly cascaded to fo rm a nonbinary ripple chain and can be programmable. The principle is particularly useful for a nonbinary prescaler. A synchronous nonbinary counter using this principle is also presented. Simulations show that , in a 1.0 mum CMOS process, the nonbinary divider and its ripple chai n can work up to 1.2 GHz.