A 52-to-57 GHz CMOS Phase-Tunable Quadrature VCO Based on a Body Bias Control Technique

This paper presents a 52-to-57 GHz CMOS quadrature voltage-controlled oscillator (QVCO) with novel I/Q phase tuning technique based on body bias control method. The QVCO employs an in-phase injection-coupling (IPIC) network comprising four diode-connected FETs for the generation. error is calibrated by controlling voltage offset of QVCO’s core FETs. effectively covers wide range between −13.4° and +10.7°. It also minimally induces unwanted variations in noise, current dissipation, oscillation frequency, which were found to be only 0.4 dB, 0.07%, 36 MHz, respectively. After IPIC-QVCO, phase-tunable two-stage LO buffer employing 3-bit switched-capacitor bank was added additional tuning, leading extension up −22.7–+20.0°. proposed implemented 40 nm RF process. measured results show that frequency band from 52.4 57.6 while consuming 26.2 mW. noise figure-of-merit are −91.8 dBc/Hz at 1 MHz −172.4 dBc/Hz, We realized fully integrated 55 transmitter generator. effectiveness generator confirmed verifying image rejection ratio (IRR) calibration output.