An analog CMOS VLSI neural processing chip has been designed and fabri(cid:173) cated. The device employs "pulse-stream" neural state signalljng, and is capa(cid:173) ble of computing some 360 million synaptic connections per secood. In addi(cid:173) tion to basic characterisation results. the performance of the chip in solving "real-world" problems is also demonstrated.