Title :
An oversampling converter for strain gauge transducers
Author :
Kerth, D.A. ; Piasecki, D.S.
Author_Institution :
Crystal Semiconductor, Austin, TX, USA
Abstract :
Oversampling converters with digital filters tailored to remove line-frequency interference have recently been introduced to DC measurement. The authors extend the approach to address the problems of low-noise amplification, drift and aging, and interference modulation. The block diagram of the monolithic system is shown. The 1/f noise of the converter is removed through chopper stabilization. Transducer AC excitation and chopper stabilization remove drift components due to thermocouples and amplifier offsets, respectively. Chip performance is summarized.<>
Keywords :
analogue-digital conversion; monolithic integrated circuits; signal processing equipment; strain gauges; 1/f noise; AC excitation; ADC chip; aging; chopper stabilization; digital filters; drift; interference modulation; line-frequency interference; low-noise amplification; monolithic system; oversampling converter; strain gauge transducers; Capacitive sensors; Circuit topology; Circuits and systems; Delta modulation; Noise figure; Performance gain; Photonic band gap; Transducers; Transfer functions;
Conference_Titel :
Solid-State Circuits Conference, 1992. Digest of Technical Papers. 39th ISSCC, 1992 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0573-6
DOI :
10.1109/ISSCC.1992.200401
