A reconfigurable 4.7–6.6GHz and 8.5–10.7GHz concurrent and dual-band oscillator in 65nm CMOS

摘要

A triple-mode 65nm CMOS VCO is designed to be reconfigurable to operate in two frequency bands, 4.7–6.6GHz and 8.5–10.7GHz, either concurrently or one at a time. Operated concurrently in the lower and higher bands, the VCO consumes 1.6mA at 1.2V and measures tuning ranges of 35%/23%, phase noise of −130/−128dBc/Hz at 10-MHz offset, corresponding to FOMs of −184/187dB, respectively. Operated in the lower and higher bands one at a time, the VCO consumes 0.75mA/1.43mA at 1.2V with tuning ranges of 34%/23% and phase noise of −131/−128dBc/Hz at 10-MHz offset, which correspond to FOMs of −186dB and −185dB, respectively.