Dynamic sensor compensation using analogue adaptive filter compatible with digital technology

An analogue adaptive filter for dynamic response compensation of a load cell sensor is presented. The filter employs only transistors and therefore it can be integrated using standard digital CMOS technology, which is suitable for system-on-chip applications. To perform adaptive compensation over a wide range of measurand, a novel CMOS multiplier circuit was developed. The analogue adaptive filter has been designed and simulated using 0.35 /spl mu/m 3.3 V BSim3v3 CMOS foundry models and found to achieve effective compensation.