Abstract: A low-power IC for function electrical stimulation (FES) of nerves is designed for an implantable system and fabricated in CSMC’s 0.6μm CMOS technology.The IC can be used for stimulating animals’ spinal nerve bundles and other nerves connected with a cuff type electrode.It consists of a pre-amplifier,a main amplifier,and an output stage.According to the neural signal spectrum,the bandwidth of the FES signal generator circuit is defined from 1Hz to 400kHz.The gain of the circuit is about 66dB with an output impedance of 90Ω.The IC can function under a single supply voltage of 3～5V.A rail-to-rail output stage helps to use the coupled power efficiently.The measured time domain performance shows that the bandwidth and the gain of the IC agree with the design.The power consumption is lower than 6mW.

Key words: neural signal, CMOS, function electrical stimulation, low power, nerve