Title :
Bounding of thermal Σ-Δ modulators output for sensors
Author :
Domínguez, M. ; Castañer, L.
Author_Institution :
GDS, Univ. Politecnica de Catalunya, Barcelona, Spain
Abstract :
Analytical bounds for the output of electrothermal Σ-Δ converters are derived considering a generic M-pole thermal filter. Derivation is based on a Fourier analysis of the open loop circuit and the results have been compared with simulation of the circuit using a C program and parallel computing. Parameters such as uncertainty, operation frequency and sensitivity can be calculated for a given application. As an example, the values of a two-pole thermal circuit derived from experimental measurements of a water flow meter based on an electrothermal Σ-Δ converter have been used to analyse the effects of the value of the flow and of the operating frequency on the analytical bounds and how they compare with detailed simulations
Keywords :
Fourier analysis; sensitivity analysis; sigma-delta modulation; temperature sensors; ADC; Fourier analysis; electrothermal Σ-Δ converters; generic M-pole thermal filter; open loop circuit; operation frequency; output bounding; oversampling; sensitivity; sensors; thermal sigma-delta modulators; two-pole thermal circuit; uncertainty; water flow meter; Analytical models; Circuit simulation; Computational modeling; Electrothermal effects; Filters; Fluid flow measurement; Frequency conversion; Frequency measurement; Parallel processing; Thermal sensors;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780683
