From the course: Electronics Foundations: Semiconductor Devices
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Solution: Audio equalizer
From the course: Electronics Foundations: Semiconductor Devices
Solution: Audio equalizer
(soft upbeat music) - This is how I worked my way to a solution for the audio equalizer challenge. I started by thinking about what each part of the equalizer needed to do. And then picking Op-Amp circuits, as building blocks to accomplish those tasks. For the two filter blocks. I decided to use a basic Op-Amp filter circuit, that consists of an RC low pass, or high pass filter connected to an Op-Amp unity gain buffer. And for combining the two equalizer signals back together at the end. That's a perfect application for an Op-Amp summing amplifier. With those two blocks in place. I just needed to figure out how and where. I wanted to include the ability to control the gain for each equalizer band. One possibility that I considered was using Rios stats. Which are manually controllable variable resistors. As each of the input resistors on the final summing amplifier stage. Well, that seemed like a viable…
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