Improving the resolution of Lazzaro winner-take-all circuit


Sekerkiran B., Cilingiroglu U.

1997 IEEE International Conference on Neural Networks (ICNN 97), Texas, United States Of America, 9 - 12 June 1997, pp.1005-1008 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Texas
  • Country: United States Of America
  • Page Numbers: pp.1005-1008

Abstract

This paper describes an improvement on Lazzaro winner-take-all (WTA) circuit which is one of the most widely used architectures among all CMOS WTA circuits. A salient drawback of the original circuit is its limited resolution which stems from low gain of its stages. Unlike previously reported improvements based on positive feedback, the output impedance of the current source providing the negative feedback have been increased by inserting a cascode connected transistor. Although very simple, this modification confers significant resolution improvement on the circuit.