A 16 nm-FinFET 100 MHz 4th-order Fully-Differential Super-Source-Follower Analog Filter

This paper presents a 4th-order continuous-time analog filter, with 100 MHz pass-bandwidth, based on the Super-Source-Follower biquadratic cell. The device is designed in order to meet specification for the latest telecommunications standards (LTE and 5G) and to efficiently operate in 16 nm-FinFET technology, exploiting the higher transistor intrinsic gain and efficiency, compared to the CMOS planar counterpart. Nonetheless, this work improves the Source-Follower analog filters state-of-the-art introducing a fully-differential biquadratic cell. The filter achieves 15.1 dBm in-band IIP3 at 10 MHz & 11 MHz input tones, with $968\ \mu \mathrm{W}$ power consumption from a single 1V supply voltage. In-band integrated noise is $85.78\ \mu \mathrm{V}_{\mathrm{rms}}$ for an overall Figure-of-Merit of 162.8 dB (j−1) which outperforms analog filters state of the art.