A sensor readout circuitry, a biopotential signal sensor, a neural probe, and a method for readout of an analog sensor input signal. Interuniversitair Micro-Electronica Centrum vzw
A sensor readout circuitry comprises: a delta-sigma modulator (102); an input stage (110) for receiving an analog sensor input signal, wherein a transconductance amplifier (120) and a current mirror (160) incorporate a flipped voltage follower (128, 130), wherein a feedback signal from a digital-to-analog converter (108) of the delta-sigma modulator (102) is received such that subtraction between the analog sensor input signal and the feedback signal is performed in the transconductance amplifier (120) and mirrored by the current mirror (160) to an output (170, 172) of the input stage (110); ...