A 1-GHZ/0.9-MW CMOS SIMOX DIVIDE-BY-128 129 DUAL-MODULUS PRESCALER USING A DIVIDE-BY-2/3 SYNCHRONOUS COUNTER

This paper presents an extremely low-power CMOS/SIMOX divide-by-128/129 dual-modulus prescaler. While operating at up to 1 GHz and dissipating merely 0.9 mW at a supply voltage of 1 V, it is capable of 2-GHz performance with dissipation of 7.2 mW at 2 V. This superior performance is primarily achieved by using an advanced ultrathin-film CMOS/SIMOX process technology combined with a new circuit configuration that uses a divide-by-2/3 synchronous counter. Using these same technologies, a single-chip CMOS PLL LSI that uses the developed prescaler is also fabricated. This CMOS PLL LSI can operate at up to 2 GHz while dissipating only 8.4 mW at a supply voltage of 2 V. Even at a lower supply voltage of 1.2 V, 1-GHz operation can be obtained with a corresponding power consumption of merely 1.4 mW. These results indicate that the high-speed and very-low-power features of CMOS/SIMOX technology could have an important impact on the development of future personal communication systems.