ISSN:
1573-1979
Keywords:
transducer interface
;
smart sensor system
;
smart sensor interface
;
bridge interface
;
captive interface
;
universal transducer interface
Source:
Springer Online Journal Archives 1860-2000
Topics:
Electrical Engineering, Measurement and Control Technology
Notes:
Abstract This paper presents a new universal transducer interface.This interface, which is read out by a microcontroller, servicesthe following sensor elements: capacitors, platinum resistors,thermistors, resistive bridges and potentiometers. The A/D conversionis based on a first-order oscillator. A combination of classicaland some new measurement techniques has been applied on a singlechip to obtain high accuracy, good long-term stability and areduction of the effects of interference and parasitic elements.The circuit has been fabricated in a 0.7 µm CMOSprocess. The main test results are: an accuracy of 10–15bits and a resolution up to 16 bits while the measurement timeis in the range 1–100ms. These results hold over the temperaturerange −20°C to 80°C. Calibrationof the electronic part is not required. The number of externalcomponents has been kept to a minimum.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1008246103915
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