Abstract
AbstractWe introduce time‐mode circuits, a set of basic circuit building blocks for analog computation using a temporal step function representation for the inputs and outputs. These novel time‐mode circuits are low power, provide good noise performance and offer improved dynamic range. The design, IC implementation and detailed theoretical signal‐to‐noise ratio (SNR) analysis of a prototype time‐mode circuit—a weighted average computation circuit—are discussed. This new way of computation is studied with respect to existing conventional voltage‐mode and current‐mode circuits. Two possible applications of these time‐mode circuits are presented: an edge detection circuit for 16 pixels and a 3‐tap FIR filter that provides an SNR of 64 dB. Copyright © 2008 John Wiley & Sons, Ltd.
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