A Ku-Band −200.2-dBc/Hz FoMT Low-Power Low-Phase-Noise LC-VCO IC with a Novel Feedback Circuit Using the Leakage Current

A Ku-band low-power low-phase-noise LC-VCO IC with a novel feedback circuit is presented in this paper. The novel feedback circuit controls a bias voltage to the VCO core circuit to reduce the dc power consumption and guarantees the robust start-up of the oscillation. The leakage current is utilized to drive the feedback circuit so that the dc power consumption in the feedback circuit is suppressed. The proposed Ku-band LC- VCO IC has exhibited a measured phase noise of −133.9 dBc/Hz, an FoM of −192.0 dBc/Hz, and an FoMT of −200.2 dBc/Hz under the maximum total power consumption of 2.98 mW.