Title :
High speed and high resolution current winner-take-all circuit in conjunction with adaptive thresholding
Author :
Fish, Alexander ; Milrud, V. ; Yadid-Pecht, Orly
Author_Institution :
VLSI Syst. Center, Ben-Gurion Univ., Beer-Sheva, Israel
Abstract :
A CMOS high performance current mode winner-take-all (WTA) circuit is presented. The circuit employs a novel technique for inhibitory and excitatory feedbacks based on input currents average computation, achieving both high speed and high resolution. The proposed WTA circuit can be used in a wide variety of applications, while its architecture allows implementation of adaptive thresholding, making it also suitable for visual attention and tracking applications, where "background" inhibition and false alarm reduction are required. The circuit is designed for operation with a wide range of input current values, allowing its integration with circuits operating both in subthreshold and strong inversion regions. Two circuits, each for a different range of input currents, have been implemented in a standard 0.35 μm CMOS process available through MOSIS and are operated via a 3.3 V supply. Their operation is discussed and simulation results are reported.
Keywords :
CMOS integrated circuits; circuit feedback; current-mode circuits; high-speed integrated circuits; image resolution; integrated circuit modelling; optical tracking; 0.35 micron; 3.3 V; CMOS circuit; MOSIS; WTA circuit; adaptive thresholding; current mode winner take all circuit; excitatory feedback; false alarm reduction; high resolution current winner-take-all circuit; high speed current winner-take-all circuit; inhibitory feedback; input currents average computation; strong inversion region; subthreshold region; tracking application; visual attention; CMOS process; Circuit simulation; Computer architecture; Energy consumption; Feedback circuits; Hysteresis; Marine animals; Organizing; Target tracking; Very large scale integration;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1329138