A Tunable Passive Filter for Low-Power High-Speed Equalizers

This paper presents the design and implementation of an integrated tunable passive filter for low-power continuous-time adaptive equalization. Based on a broadband matched high-pass filter topology, a PMOS biased in linear region is used to adjust the low-frequency attenuation for equalizing channel losses. A 0.13-mum prototype demonstrates gain compensation up to 17 dB at 5 GHz without any power consumption