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A novel approach t o signal processing in cochlea implants using bio-inspired models is proposed. The novel architecture is using spike-based signal processing eliminating the need for DSPs. The programmability is achieved using redundancy with digital control avoiding ADCs altogether. The neuromorphic cochlea implant should reduce both power and size t o a level of an implantable system.

In this paper we investigate the relationship between the pulse-coded signal representation found in biological neurons and signals represented by first-order delta-sigma bit-streams. We show that a first-order delta-sigma bit-stream is a digital equivalent to a pulse-coded neural signal. By increasing the clock frequency, a delta-sigma bit-stream can approach a pulse-coded representation with arbitrary accuracy. d sqr( s i n ( 2~ s, " ka('r)dT) ) d t

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