A novel 1V-supply, low power, wide tuning range voltage controlled oscillator implemented in 0.18/spl mu/m CMOS technology

Abstract

This paper describes the design of a very low power low phase noise, wide turning range oscillator for battery operated equipment. The proposed design allows an implementation of voltage controlled ring oscillator (VCO) operating at I Volt supply voltage. Implemented in 0.18μm CMOS technology, operating at 50MHz to 250MHz, the proposed VCO has a tuning range of almost 50%. At 125MHz the phase noise of the VCO is - 98dBc/Hz@1MHz offsert the carrier consuming very low power, 0.41mW. The silicon area of the designed VCO is 35μm by 95μm.