Title :
A high frequency stray-immune capacitance transducer based on the charge transfer principle
Author :
Huang, Shanjin ; Green, Robert G. ; Plaskowski, Andrzej ; Beck, Maurice S.
Author_Institution :
Dept. of Instrum. & Anal. Sci., Univ. of Manchester Inst. of Sci. & Technol., UK
fDate :
9/1/1988 12:00:00 AM
Abstract :
A stray-immune capacitance measuring instrument based on the charge transfer principle is described. It has a programmable measurement frequency up to several megahertz and is inexpensive and suitable for integration onto a single chip. The effects of stray capacitances, including those of the switching components, have been eliminated by using a special switching arrangement, resulting in a baseline drift of 0.02 pF (at 1-MHz measurement frequency) over a 12-h period
Keywords :
capacitance measurement; charge-coupled device circuits; transducers; 1 MHz; 12 hours; CMOS switch; charge transfer principle; high frequency stray-immune capacitance transducer; programmable measurement frequency; Capacitance measurement; Capacitive sensors; Charge measurement; Charge transfer; Circuits; Current measurement; Frequency; Parasitic capacitance; Pulse amplifiers; Transducers;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
