Sub 0.5-V bulk-driven winner take all circuit based on a new voltage follower

A new solution for a bulk-driven ultra-low-voltage winner take all (WTA) circuit is described. The WTA structure is based on a new voltage follower (VF) circuit which could also be used in other applications as a general purpose precise VF for sub 0.5-V operation. Both proposed circuits are compact and provide precision operation confirmed by theoretical analysis.

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