Join Barron Stone for an in-depth discussion in this video ✓ Challenge: Audio equalizer, part of Electronics Foundations: Semiconductor Devices.
- [Narrator] It's time for a final challenge.…This is your chance to practice using…op-amp circuits as building blocks…to create more complicated devices.…For this challenge I need your help…to design an audio equalizer to use in my stereo.…An equalizer is an electronic device…that's used to adjust the balance of different…frequency components in an electrical signal.…They're commonly used in audio systems…to control how music will sound…when it's played on different speaker systems.…The equalizer consists of a bank of electronic filters.…
Each filter has a different pass band…and the gain of each filter…can be individually controlled…to allow more or less of it's specific…frequency content through.…In a recording studio…it's not uncommon to encounter expensive…equalizer boards that have 30 or more…adjustable frequency bands.…On the other end of the spectrum…low cost equalizers,…like you might find on a car stereo,…usually have three frequency bands.…Labeled as bass, mid, and treble.…
Although the exact frequency range for each band…
- Semiconductor materials
- Diode applications
- Rectifying a signal
- Detecting the signal peak
- Protecting against large signals, reverse current, and flyback voltage
- Special purpose zener diodes, Schottky diodes, and photodiodes
- NPN and PNP bipolar junction transistors
- Using a BJT as a switch
- Field effect transistors
- Differences between BJTs and MOSFETs
- Operational amplifiers
- Op-amp applications
- Comparing signals
- Buffering signals
- Amplifying signals
- Filtering signals
- Combining signals
Skill Level Intermediate
Learning to use MakerBot 3D Printerswith Kacie Hultgren1h 5m Intermediate
2. Diode Applications
3. Special Purpose Diodes
4. Bipolar Junction Transistors
5. Transistor Applications
6. Field Effect Transistors
7. Operational Amplifiers
Feedback circuits6m 30s
8. Op-Amp Applications
Next steps1m 9s
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