A tunable flipflop-based frequency divider up to 113 GHz and a fully differential 77GHz push-push VCO in SiGe BiCMOS technology

Abstract

We present a tunable flipflop-based frequency divider and a fully differential push-push VCO designed in a 200GHz f T SiGe BiCMOS technology. A new technique for tuning the sensitivity of the divider in the frequency range of interest is presented. The chip works from 60GHz up to 113GHz. The VCO is based on a new topology which allows generating differential push-push outputs. The VCO shows a tuning range larger than 7GHz. The phase noise is 75dBc/Hz at 100kHz offset. The chip shows a frequency drift of 12.3MHz/C. The fundamental signal suppression is larger than 50dB. The output power is 2×5dBm. At a 3.3V supply, the circuits consume 35mA and 65mA, respectively.