Fast, precise, and inexpensive AD-converters of a new time-division configuration for intelligent ohmic and capacitive sensors

Author

Horn, Klaus

Author_Institution

Inst. fuer Messtechnik & Austausbau, Tech. Univ. Braunschweig, West Germany

fYear

1989

fDate

8-12 May 1989

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/CMPEUR.1989.93417

Filename

93417