Single-channel analog front-end for a 40 kHz air-coupled ultrasonic receiver using a 5 V single supply, buffered 2.5 V mid-reference, protection, gain, band-pass shaping, and ADC-ready output c... show moreSingle-channel analog front-end for a 40 kHz air-coupled ultrasonic receiver using a 5 V single supply, buffered 2.5 V mid-reference, protection, gain, band-pass shaping, and ADC-ready...