Title :
High accuracy differential capacitive circuit for bioparticles sensing applications
Author :
Zadeh, Ebrahim Ghafar ; Sawan, Mohamad
Author_Institution :
Dept. of Electr. Eng., Ecole Polytechnique de Montreal, Que.
Abstract :
A linear differential capacitive circuit is presented. This circuit is based on a charge-based capacitance measurement (CBCM) technique. The proposed circuit is optimized so as to maximize the sensitivity, which is a critical parameter in capacitive sensors. The resulting sensitivity is 200mV/fF with a noise level equivalent to 5aF. This circuit is intended as an interface circuit for bioparticles detection in integrating with a microchannel which is fabricated in a new robotic based technique
Keywords :
capacitance measurement; capacitive sensors; microsensors; bioparticles detection; bioparticles sensing applications; capacitive sensors; charge-based capacitance measurement; differential capacitive circuit; interface circuit; linear circuit; robotic based technique; Capacitance; Capacitive sensors; Capacitors; Circuits; Ink; Lab-on-a-chip; Microchannel; Microelectronics; Pulse amplifiers; Temperature sensors;
Conference_Titel :
Circuits and Systems, 2005. 48th Midwest Symposium on
Conference_Location :
Covington, KY
Print_ISBN :
0-7803-9197-7
DOI :
10.1109/MWSCAS.2005.1594363
