A scaled electronically-configurable multichannel recording array

Abstract

This paper describes a multichannel microelectrode array capable of recording single-unit neural activity in the central nervous system. The probe features 32 recording sites on a scaled shank less than 50,[mu]m wide. On-chip CMOS circuitry implements signal amplification, multiplexing, and selftesting on eight active channels selected from among the 32 sites. The circuitry has a power dissipation of 3 mW, an active area of 2.5 mm2, and requires only three external leads. It utilizes bidirectional signal transmission over the output data lead for signal output and for channel selection.