A low-cost signal averager and data-acquisition device

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Abstract
A low-cost data-acquisition device, which can be used as a signal averager or temporary data buffer, is described. It consists of 1) an input stage built with a multiplexer, sample-and-hold amplifier, and an analog-to-digital converter; 2) a memory section made of static shift registers with recirculate capability; 3) an output stage built with a demultiplexer and a digital-to-analog converter and, 4) a control module which provides the logic signals to operate the machine. Basic diagrams are presented and several applications are described.

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