Abstract:A receiver for PAM-4 encoded data signals is presented, which was measured to receive data at 22 Gbit/s with a BER<10 -12 at a maximum frequency deviation of 350 ppm and a 2 7 -1 PRBS pattern. We propose a novel voltage shifting amplifier to introduce a programmable offset to the differential data signal. A CML biasing scheme using programmable matched resistors limits the effect of process variations. The receiver also features a programmable signal termination, an analog equalizer and offset compensation for… Show more
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