Title :
Low noise amplification for optical detector arrays [microbes detection]
Author :
Duncan, A. ; Powers, L.
Author_Institution :
Nat. Center for the Design of Molecular Function, Utah State Univ., Logan, UT, USA
Abstract :
Detection of low intensity light pulses is accomplished using a three stage amplifier design. A highly sensitive input stage provides a large gain and buffers the sensor from the following stages. An integration stage averages the input signal and holds the output value during data collection. Low impedance output drive capability and noise immunity are provided by a third stage. The combination of these three stages produces a system capable of detecting photocurrent signals in the range of 10-100 nA.
Keywords :
amplifiers; biological techniques; microorganisms; optical arrays; optical sensors; photoelectricity; 10 to 100 nA; biophysical technique; highly sensitive input stage; integration stage; low impedance output drive capability; low intensity light pulses detection; low noise amplification; microbes detection; noise immunity; optical detector arrays; output value holding; photocurrent signals detection; Impedance; Optical amplifiers; Optical arrays; Optical buffering; Optical detectors; Optical noise; Optical pulses; Photoconductivity; Pulse amplifiers; Sensor arrays;
Conference_Titel :
Engineering in Medicine and Biology Society, 2001. Proceedings of the 23rd Annual International Conference of the IEEE
Print_ISBN :
0-7803-7211-5
DOI :
10.1109/IEMBS.2001.1017440
