Arent Fox LLP
Decision feedback equalizer
A decision feedback equalizer for N-level amplitude modulated signal, includes: (N−1) level conversion circuits to add (N−1) shifting voltages to the amplitude modulated signal respectively; (N−1)×N determination feedback equalization-correction circuits to perform N types of decision feedback equalization processing, each of which adding each of N-level offset voltages corresponded to any one of N levels of a reception data ahead of one data cycle, on each of the (N−1) level shifted signals to generate (N−1) sets of N equalization correction signals; (N−1)×N comparison circuits; (N−1)×N first latch circuits; (N−1) selection circuits to select a comparison result of the N comparison circuits in each (N−1) sets; (N−1) second latch circuits; and a decoder, wherein each of the (N−1) selection circuits selects an equalization-correction signal among the N equalization-correction signals in each (N−1) set according to outputs latched by the (N−1) second latch circuits.
FUJITSU LIMITED
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H04L H04L H04L
inventional additional inventional
Yasufumi Toshihiko
Sakai Mori