Title :
A study of a high-resolution linear circuit for capacitive sensors
Author_Institution :
Div. of Sensor Technol., Swedish Defence Res. Establ., Linkoping, Sweden
fDate :
12/1/1999 12:00:00 AM
Abstract :
A circuit for capacitance measurements is described. The circuit permits offset capacitance compensation using a dc voltage. The electronic circuitry with its testing is described. The output voltage is a linear function of the capacitance measured. Experimental data show good agreement with values predicted by the linear formula. Experiments show it is possible to measure capacitance changes with a resolution of a few femtofarads (fF)
Keywords :
capacitance measurement; capacitive sensors; capacitance measurement; capacitive sensor; linear circuit; offset compensation; Capacitance measurement; Capacitive sensors; Capacitors; Circuit testing; Detectors; Electronic equipment testing; Linear circuits; Phase detection; Ultrafast electronics; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
