Sampling and Reconstruction of Zero-Order Hold Signals by Parallel RC Filters

Abstract

In this work we describe a reconstruction algorithm for zero-order hold (ZOH) waveforms measured by a parallel sam-pling scheme. In the method the ZOH signal is fed to a parallel network consisting of resistor-capacitor (RC) filters, whose outputs are sampled simultaneously. The algorithm reconstructs N previous samples of the input signal from output samples of N parallel RC circuits. The method is especially useful in sampling and reconstruction of the ZOH signals produced by the digital-to-analog converters. Using the parallel sampling method the sampling rate of the analog-to-digital converters can be increased by a factor of N. We discuss a variety of applications such as reconstruction of ZOH pulse sequences produced by ultra wide band (UWB) transmitters

Reconstruction of UWB Impulse Train by Parallel Sampling of Cascaded Identical RC Filters

“…A variant of the parallel sampling scheme is tailored for detection of edges [11,12]. The parallel sampling scheme can be applied to reproduce transient signals without ad hoc knowledge of the signal waveform [13].…”