A RF Low Power 0.18-µm based CMOS Differential Ring Oscillator

A voltage controlled ring oscillator is implemented using the 1P6M 0.18μm CMOS process provided by TSMC with 1.8 volts power supply. Differential delay cell stages are used to reduce noise. The output frequency range is 3.125-5.26 GHz with control voltages range 1 V to 1.8 V. The simulated result of the circuit draws 0.621 mW of power from the 1.8 V supply. Keywords— CMOS, low power, phase noised, differential delay cell, voltage controlled oscillator (VCO).

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