A High DR DC-Coupled Time-Based Neural-Recording IC With Degeneration R-DAC for

Abstract

The bidirectional neural interface is essential to realize the closed-loop neuromodulation, which is the core of next-generation neurological devices. For the bidirectional neural interface, a recording circuit with a high dynamic range (DR) is required to record the neural signal while stimulating the neuronal cells simultaneously. This article presents a voltage- controlled oscillator (VCO)-based neural-recording IC, which directly quantizes the input signal and achieves a large DR to process