A novel Injection Locked Rotary Traveling Wave Oscillator

This paper proposes a novel Injection Locked Rotary Traveling Wave Oscillator (IL-RTWO). The presented architechture employs a transconductance injector and a Rotary Traveling Wave Oscillator. The combination of switch Metal-Insulator-Metal capacitors (MIM-caps) and a novel use of Complementary Varactor Pairs (CVPs) achieves a 2GHz to 2.3 GHz frequency tuning range and 20kHz frequency resolution. The RTWO scheme is implemented in IBM's 130nm CMOS technology and consumes a total of 11.3mA current from a 1.2V power supply. The IL-RTWO has an inband phase noise performance of -126dBc/Hz at 100kHz offset from 2.016GHz. This reported inband phase noise is the best in class. To the author's best knowledge, the implemtation of injection locking and CVPs techniques on RTWO has not been explored before.

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