Towards a silicon implementation of the olfactory system

Our main interest is the development of a computational efficient VLSI implementation of a highly complex system proposed by Freeman and Yao (1990) to explain chaotic dynamics in the olfactory cortex using discrete time techniques. One of the issues involved with this implementation approach is the offset. This paper presents a simulation of a novel circuit for offset cancellation in switched current circuits. According to the simulation results, this new technique is able to cancel the offset and has a low sensitivity to changes in feedback parameters associated with the delay (z/sup -1/) operation.