A CMOS scalable high-speed current-mode asynchronous winner-take-all (WTA) circuit is described. The new WTA has improved resolution and operating speed compared to other current-mode WTA's, especially for large M, where M is the number of inputs. The proposed arrangement is, therefore, well suited to applications requiring large WTA systems where operating speed and resolution are important parameters [e.g., vector quantization (VQ)]. Measurements show that the proposed circuit can resolve input currents differing by less than 1 /spl mu/A with negligible loss of operating speed. Detailed measured results and simulations are presented.
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Demosthenous et al. (1998) studied this question.
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