Join Barron Stone for an in-depth discussion in this video Feedback circuits, part of Electronics Foundations: Semiconductor Devices.
- Many op-amp circuits use a closed-loop configuration,…which uses external circuitry to route some portion…of the output signal around to feed it back…into the op-amp as one of the inputs,…creating a feedback loop.…That feedback loop enables the op-amp…to effectively monitor its output signal…so it can keep from overcompensating for changes…to the input signal.…That helps the op-amp stabilize its behavior…to produce and maintain the desired output voltage.…
I use a similar form of feedback to stabilize myself…when I'm riding a bike.…Imagine for a moment that I'm an op-amp.…One of my input are the map directions…that I'm getting from my phone…and the other input is looking ahead at the road…to see where I'm going.…My output, based on those inputs, is to turn my handlebars…to the left or to the right.…Changing my output causes my bike to turn,…and by looking ahead to see where I'm going,…I can see if I've turned too much or too little,…so I can adjust my output again to compensate.…
Right now, my phone is telling me to go straight,…
- 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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