DocumentCode
73800
Title
Modified Charge Amplifier for Stray Immune Capacitance Measurements
Author
Oven, Robert
Author_Institution
Sch. of Eng. & Digital Arts, Univ. of Kent Canterbury, Canterbury, UK
Volume
63
Issue
7
fYear
2014
fDate
Jul-14
Firstpage
1748
Lastpage
1752
Abstract
It is shown theoretically and by experimentation that the ac stray immune capacitance meter based on the charge amplifier circuit can be modified to reduce the effects of the parasitic capacitance across the feedback capacitor. This is achieved by simply introducing a unity gain buffer amplifier within the circuit loop.
Keywords
buffer circuits; capacitance measurement; capacitive sensors; capacitors; feedback amplifiers; AC stray immune capacitance measurement; AC stray immune capacitance meter; circuit loop; feedback capacitor; modified charge amplifier circuit; parasitic capacitance effect reduction; unity gain buffer; Bandwidth; Capacitance measurement; Capacitors; Immune system; Impedance; Parasitic capacitance; Capacitance measurement; capacitive sensor; charge amplifier; operational amplifier; parasitic capacitance; parasitic capacitance.;
fLanguage
English
Journal_Title
Instrumentation and Measurement, IEEE Transactions on
Publisher
ieee
ISSN
0018-9456
Type
jour
DOI
10.1109/TIM.2014.2298673
Filename
6720154
Link To Document