Low-power CMOS and BiCMOS circuits for analog convolutionaldecoders

摘要

Analog techniques have been proposed as a method of realizingnhigh-speed low-power Viterbi decoders, mostly for use in digitalnmagnetic recording applications. However, such methods can also be usednin more general applications of the Viterbi algorithm, such asnconvolutional decoding. We describe two current-mode analog circuits fornuse in such applications. These circuits operate in excess of 100 MHz,nand consume less than 4 mW per state, with 2.8-V supply rails whennrealized in 0.8-Μm technology