Adaptive Sensor Response Correction using Analog Filter Compatible with Digital Technology

Abstract

An analog adaptive filter for response correction of a load cell sensor is presented. The filter employs only transistors and therefore it can be integrated using digital CMOS technology, which is suitable for System-on-Chip applications. To achieve adaptive compensation over a wide range of measurand, a novel CM OS multiplier was developed. The analog adaptive filter has been simulated using 0.35µm 3.3V BSim3v3 CMOS foundry models and found to perform effective compensation.