A 80.4-to-86.5 GHz E-band QVCO with Inductor tuning method and amplifier feedback in 65-nm CMOS Technology

A quadrature voltage-controlled oscillator (QVCO) with low phase noise and low power consumption is proposed. In order to improve the oscillation frequency and reduced the phase noise, a feedback network composed of buffer amplifiers and capacitors is introduced to the QVCO. And a newly structured adjustable inductor is also used in QVCO, which can improve the tuning range without adding extra power consumption. A 1-bit binary-weighted switch-capacitor is also used to widen the tuning range. From the post-layout simulation result we can see that the total power consumption is 6.7mW. The turning range of QVCO is from 80.4-to-86.5 GHz covering the entire high-band of E-band standard, and the phase noise of QVCO is below -91dBc/Hz at 1MHz offset over all 4 sub-bands. The figure-of-merit (FoM) of QVCO is -181.1.