An Adaptive Continuous-Time Linear Equalizer Using Sampled Data Edge Counting

In this paper, an adaptive continuous-time linear Equalizer (CTLE) utilizing a proposed sampled data edge counting for multi Gb/s serial links is presented. The compensation level of the equalizer is determined by counting and comparing rising edges the sampled data and fed back to the CTLE. The proposed algorithm is verified with a High-Definition Multimedia Interface (HDMI) 2.0 cable at 3 Gb/s data rate using a 180 nm CMOS process technology. The simulation shows the adaptive EQ achieves compensation range from 3 dB to 24.8 dB with a tuning range of 21.8 dB and adaptation time of 4.6 ps.