High Precision Low-Voltage WTA/LTA Circuit for Signal Processing Applications

  • Rishikesh PandeyEmail author
  • Sahib Singh


The paper proposes low-voltage current mode winner takes all (WTA)/loser takes all (LTA) circuit which detects maximum and minimum values from the given current inputs simultaneously. The circuit is developed using high swing self-biased cascode current mirror and a subtractor circuit. The cascode current mirror is used to improve the accuracy of current mirroring action over a wide input current range and subtractor circuit is used to compute the difference of two input currents. The proposed circuit operates at supply voltage of 1.1 V with high precision. The output current is mirrored with transfer error of 0.03% while input current is varying from 0 to 40 μA. Simulations have been performed using SPICE level 53 (TSMC) parameters in 0.18 μm CMOS technology. Some of the applications of the proposed WTA/LTA circuit such as half wave rectifier, full wave rectifier and modulus circuit have also been presented to show the effectiveness of the proposed circuit.


Current mirror Low-voltage Rectifier SPICE WTA/LTA circuit 


Compliance with Ethical Standards

Conflict of interests

The authors declare that there is no conflict of interests regarding the publication of this paper.


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Electronics and Communication EngineeringThapar Institute of Engineering and Technology (Deemed to be University)PatialaIndia

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