A 134-Pixel CMOS Sensor for Combined Time-of-Flight and Optical Triangulation 3-D Imaging

Sgrott, Oreste; Mosconi, Daniel; Perenzoni, Matteo; Pedretti, Gianmaria; Gonzo, L.; Stoppa, David

doi:10.1109/jssc.2010.2048076

Cited by 11 publications

(1 citation statement)

References 19 publications

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“…Winner-Take-All (WTA) circuits are one of the most important building blocks in analog parallel signal processing, such as spatial acquisition and tracking, sound localization, image processing and neuromorphic systems [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. The main function of a WTA is to select the highest input signal among multiple inputs, so two-input WTAs can also be used as half-wave and full-wave rectifiers [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Decision Levels and Resolution for Low-Power Winner-Take-All Circuit

Costea

2023

Sensors

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Sensors in many applications must select the largest element in a sequence of currents. This can be performed in an analog way by the Winner-Take-All (WTA) circuit. This paper considers the classic version of the WTA Lazzaro circuit, working with MOS devices in a subthreshold regime. Since the separation of the gainer by analytically computable “decision levels” has recently been introduced, this paper aims to numerically verify and discuss these levels and their dependence on circuit and device parameters. For VT, the threshold voltage of MOS devices, which is primarily responsible for differences between components (mismatch), its relationship with the output voltages is theoretically demonstrated and numerically checked.

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