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How to Design High-Pass and Low-Pass Filter Circuits Quickly

Last Updated on April 10, 2022 by Swagatam 34 Comments

high2Bpass2Bgraph

In this post I have explained how to design audio filter circuits such as high pass filter and low pass filter circuits effortlessly without going through the hassles of complex simulation and calculations. The presented designs will enable creating filter circuits only for the desired specific frequency bands and block all other unwanted frequencies. What’s […]

Filed Under: Audio and Amplifier Projects Tagged With: Circuits, Design, Filter, High, Pass, Quickly

Match Transistor Pairs Quickly using this Circuit

Last Updated on October 5, 2020 by Swagatam 17 Comments

transistor matching tester compressed

In many critical circuit applications, like power amplifiers, inverters, etc it becomes necessary to use matched transistor pairs having identical hFE gain. Not doing this possibly creates unpredictable output results, such as one transistor getting hotter than the other, or asymmetrical output conditions. By: David Corbill To eliminate this, matching transistor pairs with their Vbe […]

Filed Under: Meters and Testers Tagged With: Match, Pairs, Quickly, Transistor

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