Low Voltage and High Speed Dual-Modulus Prescaler with E-TSPC Technology for Frequency Synthesizer

Abstract

In this paper, a new extended true-single-phase-clock (E-TSPC) based divide-by-2/3 prescaler is proposed for low supply voltage and low power consumption applications. By using pass transistor logic and changing the logic gates, the critical path between the E-TSPC flip-flops has been reduced. Prescaler is designed by Cadence in chartered 0.18 µm CMOS process. Simulation results show that proposed dual-modulus prescaler can work up to 3.9 GHz under 0.9 V supply voltage with 226 µW power consumption and it is suitable for low power and high speed frequency synthesizer in wireless communication system.