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This brief presents a low-power 20-Gb/s decision feedback equalizer (DFE) with one discrete tap and two infinite impulse response (IIR) filters feedback. The advantage of the IIR-DFE lies in both great energy and area efficiency for large channel attenuations. To further enhance the power efficiency of the IIR-DFE, the charge-steering logic (CSL) is utilized in this brief. Besides, the quarter-rate...
We present the first continuous-time digital IIR filter with power consumption tracking the input activity and varying by over 50×, resulting in a FoM varying from 2.5iJ to 0.05ÍJ. Only two tapped delays are used for a sixth-order filter. The 1.2 V 65nm CMOS prototype achieves very high stopband rejection and includes an output converter to synchronous mode, allowing integration with discrete-time...
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