A Precise Amplifier for Digitally Synthesized Source

Marian Kampik

Abstract

A precise power amplifier is described in the paper. It was designed to amplify the output ac voltage of a digitally synthesized source from 5 V to 5, 10, 20, 30 or 50 V in 0… 1 kHz frequency range. The five voltage gain coefficients may be selected by GPIB and RS-232 interfaces or from the keyboard. The main application of the amplifier is the ac-dc voltage calibration system, especially useful for evaluation of thermal converters at low frequencies.

Keywords

precise amplifier, digitally synthesized source, calibrators, ac-dc transfer, thermal converter

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IMEKO-TC7-2002-036.pdf

DOI

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IMEKO TC

TC7 - Measurement Science

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