Commercial realisations of analogue Viterbi decoders are available for
magnetic read channels. However, these implementations are restricted
to a particular coding scheme. The authors present a general approach
to the implementation of analogue Viterbi decoders having arbitrary c
oding schemes. The proposed method exploits the ability of simple anal
ogue circuits to perform the required mathematical functions. Simulati
on results are presented for a 0.8 mu m BiCMOS process