An oversampling converter for strain gauge transducers

Author

Kerth, D.A. ; Piasecki, D.S.

Author_Institution

Crystal Semiconductor, Austin, TX, USA

fYear

1992

fDate

19-21 Feb. 1992

Firstpage

42

Lastpage

43

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ISSCC.1992.200401

Filename

200401