According to an embodiment of the present invention, a neural signal recording circuit includes: a trans-conductor in which a differential voltage pair is provided to generate and output a corresponding differential current pair; and a quantization unit which generates signals having a frequency corresponding to each of the differential current pairs, and forms a digital code corresponding to the phase difference of the signals, wherein the digital code corresponds to the voltage difference between the differential input voltage pairs. The present invention provides a device capable of recording neural signals with electrical stimulation while having high fidelity.
INPUT SIGNAL PROCESSING CIRCUIT AND NEURAL SIGNAL RECORDING CIRCUIT USING THE SAME