MC Head Amp Circuit Compendium

Here is the new updated moving coil head amp designs compendium – updated 31 July 2019. The first file is a PDF compendium of about 28 different circuits with noise, distortion and current consumption details. All the LTspice sim files are zipped in the second file. What is immediately apparent from this is that having […]

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The Monolithic Op-Amp: A Tutorial Study

This was an invited paper at the ISSCC in 1974 by James Solomon, who at the time worked for National Semiconductor (acquired in 2011 by TI). Those were heady days in semiconductors, with major process and circuit design breakthroughs taking place at breakneck speed. The general purpose microprocessors’  pivotal role in powering the Apple II […]

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Michael Kiwanuka: SOA Protection for Audio Power Amplifiers

Power Amplifiers, and especially bipolar output designs, require output stage  protection  in the event of a fault, or the presence of a heavy or highly reactive load.  Michael Kiwanuka explains the intracacies and the design methodology in his paper here  soaprot_12-03-2012  

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