Title :
A virtual point array for parabolic voltage interpolation
Author :
Warren, Michael ; Wilson, Denise M.
Author_Institution :
Dept. of Electr. Eng., Washington Univ., Seattle, WA, USA
Abstract :
A method of increasing resolution among a set of DC voltages is presented. The circuit utilizes analog computation to interpolate between voltages with varying degrees of curvature or shift. In comparison to digital computational circuitry, improvements in space and system integration are achieved. The array enables the creation of unlimited (the practical number will be limited by transistor process variations) virtual points between real data points with little to no separation. Experimental fits with true parabolic behavior have correlation coefficients R2 higher than 0.97. Application to sensing tasks such as improving spectroscopic resolution of photodetector channel outputs are proposed
Keywords :
analogue processing circuits; arrays; image sensors; interpolation; photodetectors; DC voltages set; analog computation; correlation coefficients; parabolic behavior; parabolic voltage interpolation; photodetector channel outputs; resolution improvement; sensing tasks; spectroscopic resolution; virtual point array; Analog computers; Feedback circuits; Interpolation; MOSFETs; Optical filters; Photodetectors; Probes; Sensor arrays; Spectroscopy; Voltage;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Conference_Location :
Phoenix-Scottsdale, AZ
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010333
