A wide‐frequency‐range, fault‐tolerant, common‐mode‐noise‐suppressed LC‐VCO with reversed varactor technique

This letter presents a wide frequency tuning range (FTR), fault‐tolerant, and common‐mode‐noise (CMN)‐suppressed LC‐VCO using the Reversed‐varactor (RV) technique. The RV technique maintains a wide frequency tuning range, ensures that the CMN emitted from the internal devices and external working environment is not multiplied by K VCO 2 , and improves the fault‐tolerant property of the LC‐VCO. The simulation results show that this technique reduces the phase noise (PN) by 6d Bc/Hz to 6.8 dBc/Hz, while the frequency fluctuation due to the single‐event‐transient (SET) effect decreases by about 90.2%. The proposed LC‐VCO works from 14.6 GHz to 21.3 GHz, has ‐100.3 dBc/Hz@1 MHz at 18.2 GHz working frequency and 5.7 mW power consumption.