A 1.75-GHz/3-V Dual-Modulus Divide-by-128/129 Prescaler in 0.7-μM CMOS

A dual modulus divide-by-128/129 prescaler has been developed in a 0.7-μm CMOS technology. A new circuit technique enables to limit the high-speed section of the prescaler to only one divide-by-2 flipflop. That way a dual-modulus prescaler with the same speed as an asynchronous divider can be obtained. The measured maximum input frequency of the prescaler is up to 1.75 GHz, and the power consumption is 8 mA from a single 3-V power supply.