A Low-Power 2-to-7 Modulus Programmable Prescaler with 50% Output Duty Cycle

This paper presents a novel optimized low-power multi-modulus programmable frequency divider with a modulus range of 2-to-7 with 50% output duty cycle for high-speed applications. The proposed divider is demonstrated with the division range from 2-127, which can be extended by adding more stages of the 2/3 Prescaler in the divider chain. The whole design is implemented using $0.18- \mu \mathrm{m}$ CMOS process with a supply of 1.8 V. From simulations result, the proposed design achieves a maximum operating frequency of 5 GHz with 6.5 mW of power consumption in divide-by-127 mode of operation while providing the 50% output duty cycle.