Flexible architecture for CMOS sensor interfaces

Leme, C.A.; Chevroulet, M.; Baltes, H.

doi:10.1109/iscas.1992.230398

Cited by 12 publications

(2 citation statements)

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“…P±+aHS =hS(T -Tf)+mc-ds (1) where, caSH is the incident thermal radiation absorbed by the sensor, P.=I2R, is the electrical power delivered to the sensor, h is the heat transfer coefficient referred to the sensor surface area S, Ts is the sensor temperature, Tf is the fluid temperature, m is the sensor mass, c is the sensor specific heat.…”

Section: Background Definitionsmentioning

confidence: 99%

“…Other Wheatstone bridge configurations use pulse width modulation in the feedback loop. The simplicity and robustness of sigma-delta A/D converters makes this category of A/D converters an excellent candidate for smart sensor applications [1,2]. Realizing both functional and economical characteristics of integrating sensor and signal processing functions on a chip sets a challenge of complexity and component tolerance on the integrated circuit design.…”

Section: Introductionmentioning

confidence: 99%

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Thermal Σ-Δ Modulator: Anemometer Performance Analysis

Almeida

Freitas

Palma

et al. 2007

2007 IEEE Instrumentation &Amp; Measurement Technology Conference IMTC 2007

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In this paper we propose a feedback architecture with a thermoresistive sensor, based on the thermal sigma-delta principle to realize digital measurement ofphysical quantities that interacts with the sensor: temperature, thermal radiation, fluid speed. This architecture uses a 1-bit sigma-delta modulator for which a considerable part of the conversion functions is performed by a thermoresistive sensor. The sensor is modelled using the electrical equivalence principle and the constant temperature measurement method is applied We present an analysis of the system performance, in terms of frequency response and system measurement resolution, of a 1-bit first-order Z7-J thermal modulator. It is shown that the system performance depends on the system oversampling ratio (OSR) and on the system transfer function pole and zero, which in turn, depends on the thermal and physical sensor characteristics and on the system operating conditions. This system is proposed as anemometer.

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Section: Background Definitionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%