Abstract

This paper presents a three-stage 1. 8V ring VCO in a 0. 18 ?m CMOS technology with wide tuning range and a good phase noise differential ring oscillator . The oscillator architecture is a three stage differential ring with Multi pass path using push- pull inverters. The circuit was implemented and the measured tuning range of the from 3. 8741 GHz to 5. 913 GHz, phase noise is -106dBc/Hz from center frequency 5. 9GHz and Power Dissipation 28. 392dBm at Control Voltage 1Volt.

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