Physics
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2225..299g&link_type=abstract
Proc. SPIE Vol. 2225, p. 299-309, Infrared Detectors and Focal Plane Arrays III, Eustace L. Dereniak; Robert E. Sampson; Eds.
Physics
Scientific paper
An analytical expression for calculating the effective injection efficiency (A.C. injection efficiency) in direct injection readout hybrid focal plane array (FPA) is presented in this paper. The theory takes care of the shunt resistance due to surface leakage currents and the shift of operating point of the pixel with the variation in detector current. A study of effective injection efficiency as a function of RA (product of diode's dynamic impedance at the operating point and the area of diode) product in Hg(subscript 1-x)Cd(subscript x)Te hybrid focal plane array is reported and the role of buffered direct injection circuit in improving the effective injection efficiency has been investigated. This effective injection efficiency is then used to calculate the temporal noise. It is concluded that the BDI interface circuit plays an important role in achieving BLIP operation of FPA.
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