Title :
A current mode implementation of shunting inhibition
Author :
Moini, Alireza ; Bouzerdoum, Abdesselam ; Esbraghian, K.
Author_Institution :
Dept. of Electr. & Electron. Eng., Adelaide Univ., SA, Australia
Abstract :
In this paper we present a current-mode VLSI implementation of shunting inhibition. Our approach uses translinear circuit design techniques using MOS transistors operating in the subthreshold region. Compared to previous implementations our design achieves a larger dynamic range and also clearly demonstrates the dependence of the spatio-temporal response of the network on the input light mean-intensity. A 64-cell one-dimensional array of the SI circuit has been implemented and fabricated in a 2μ CMOS process. Hspice simulation results as well as test results obtained from the chip are presented and discussed
Keywords :
CMOS digital integrated circuits; SPICE; VLSI; circuit analysis computing; computer vision; image processing equipment; 2 micron; CMOS process; Hspice simulation results; MOS transistors; VLSI implementation; computer vision; current mode implementation; dynamic range; input light mean-intensity; one-dimensional array; shunting inhibition; spatio-temporal response; subthreshold region; translinear circuit design techniques; Biological system modeling; Biological systems; Circuit testing; Dynamic range; Filters; Image coding; Laplace equations; Retina; Signal processing; Silicon;
Conference_Titel :
Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on
Print_ISBN :
0-7803-3583-X
DOI :
10.1109/ISCAS.1997.608810
