Understanding capacitance multipliers: Using op-amps to simulate large capacitors
By
lcamtuf
Summary
This article explains the concept of capacitance multipliers in electronic circuits, focusing on how operational amplifiers (op-amps) can be used to simulate large capacitance values without physically large capacitors. The author argues that op-amps are often poorly explained in educational materials, making them a barrier for learners, and advocates for their wider use due to their improved performance, low cost, and small size. The piece covers basic op-amp theory, the capacitance multiplier circuit design, and practical applications where this technique saves cost and board space.
Source
Hacker NewsUnderstanding capacitance multipliers: Using op-amps to simulate large capacitorslcamtuf.substack.comKey quotes
· 3 pulledI think these components are usually explained poorly, making them a major stumbling block for folks trying to learn the craft.
Op-amps have gotten really good, inexpensive, and small, so I think they should be used more.
If the component is still a mystery to you, this article is probably not the best place to start; we'll cover the very basics, but I recommend carving out
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