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  4. A High-Precision and High-Dynamic-Range Current-Mode WTA Circuit for Low-Supply-Voltage Applications
 
research article

A High-Precision and High-Dynamic-Range Current-Mode WTA Circuit for Low-Supply-Voltage Applications

Saberi, Mehdi  
•
Yaghoobzadeh Shadmehri, Hossein
•
Tavakkoli Ghouchani, Mohammad
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2024
IEEE Transactions on Very Large Scale Integration (VLSI) Systems

This brief proposes a low-voltage, high-precision, and high-dynamic-range current-mode analog winner-take-all (WTA) circuit. The proposed structure employs a new high-gain stage as a feedback network between the input node of each cell and the common node of the circuit to reduce the sensitivity of the output current to the loser signals, especially when they are close to the winner. In addition, another network is employed that senses the amount of the output/winner current and adjusts the bias current of the gain stages. This ensures that the drain-source voltage of the input transistor in the winner cell matches the behavior of the output transistor's drain-source voltage, enhancing the accuracy as well as the input dynamic range (DR) of the structure. Moreover, since the circuit works properly with a minimum supply voltage of only VGS + Veff, it is a promising candidate for applications in emerging technologies with low supply voltage requirements. Based on the proposed structure, a three-input WTA circuit is designed and fabricated in a 0.18-μm CMOS technology. According to the measurement results, the proposed circuit exhibits a maximum error of 1.5% for the input signal range of 60μ A when the input frequency is 100 kHz. The silicon area occupied by the circuit is 33μm × 65μm.

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Type
research article
DOI
10.1109/TVLSI.2024.3436575
Scopus ID

2-s2.0-85205445502

Author(s)
Saberi, Mehdi  

École Polytechnique Fédérale de Lausanne

Yaghoobzadeh Shadmehri, Hossein

Ferdowsi University of Mashhad

Tavakkoli Ghouchani, Mohammad

Ferdowsi University of Mashhad

Schmid, Alexandre  

École Polytechnique Fédérale de Lausanne

Date Issued

2024

Published in
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
Volume

32

Issue

10

Start page

1955

End page

1958

Subjects

Accuracy

•

current mode

•

loser take all

•

low voltage

•

winner take all (WTA)

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SCI-STI-AXS  
Available on Infoscience
January 25, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/243975
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