Title :
Fast, precise, and inexpensive AD-converters of a new time-division configuration for intelligent ohmic and capacitive sensors
Author_Institution :
Inst. fuer Messtechnik & Austausbau, Tech. Univ. Braunschweig, West Germany
Abstract :
Discusses those types of intelligent sensors that have a passive sensing device with ohmic or capacitive pick-up elements. It is shown that by means of specific compensation methods and the time-division principle combined with a novel strategy of digital control, it is possible to reduce the effects of transfer drifts of the electronic components of the sensor circuitry, simplify the circuitry, achieve at lower resolutions (e.g., 8 b) the conversion speed of conventional dual-slope A/D converters, and allow higher resolutions (up to 20 b) at a reduced bandwidth
Keywords :
analogue-digital conversion; computerised signal processing; electric sensing devices; AD-converters; capacitive sensors; higher resolutions; intelligent sensors; ohmic sensors; passive sensing device; sensor circuitry; time-division configuration; time-division principle; transfer drifts; Calibration; Capacitive sensors; Circuits; Digital control; Filtering; Fluid flow measurement; Intelligent sensors; Microprocessors; Sensor phenomena and characterization; Switches;
Conference_Titel :
CompEuro '89., 'VLSI and Computer Peripherals. VLSI and Microelectronic Applications in Intelligent Peripherals and their Interconnection Networks', Proceedings.
Conference_Location :
Hamburg
Print_ISBN :
0-8186-1940-6
DOI :
10.1109/CMPEUR.1989.93417
