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Measurement units for digital microphone preamp

Posted: 19 Dec 2008     Print Version  Bookmark and Share

Keywords:digital microphone preamplifier 

The purpose of this application note by Analog Devices is to explain the difference between analogue and digital values when measuring the input and output of a digital microphone preamplifier with an audio analyser. Specifically, the difference between peak and rms values, when measured digitally (FFS or dBFS) or in the analogue domain (V or dBV), is examined. Some sample calculations in the following sections illustrate the necessary conversions between the various definitions.

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