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Reverse-engineering the TL431 [Project]
posted June 12 2014 12:36.39 by spic0m




A die photo of the interesting but little-known TL431 power supply IC provides an opportunity to explore how analog circuits are implemented in silicon. While the circuit below may look like a maze, the chip is actually relatively simple and can be reverse-engineered with a bit of examination. This article explains how transistors, resistors, and other components are implemented in silicon to form the chip above.



[Link: Ken Shirriff]
 
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