Wide Programmable Range Fourth-Order, Fully-Differential Sallen-Key MOSFET-C LPF for Impedance Spectroscopy Measurements and Self-X Sensory Electronics in Industry 4.0

Abstract This paper picks up the need for a wide range programmable corner frequency anti-aliasing and antiimaging filters in on-chip impedance spectroscopy sensor signal readout circuitry with self-X properties (selfdiagnosing/healing) industry 4.0 applications. A fourthorder tunable MOSFET-C low pass filter is designed by using XFAB 0.35 μm CMOS technology Cadence design tools. The proposed circuit based on fully differential Sallen-Key architecture Butterworth approximation. It covers from 30 Hz to 7 MHz. Tunability achieved potentially high resistance linearized configurable MOS resistor control pole frequency. elements serve as tuning knobs be controlled machine learning. physical area 0.39mm 2 .