Join Barron Stone for an in-depth discussion in this video Compare signals, part of Electronics Foundations: Semiconductor Devices.
- [Instructor] When an operational amplifier is used…in the open-loop configuration without any feedback,…it can be used as a comparator…which looks at the voltage at each of its input terminals…and determines which is the largest of the two.…The comparator outputs the voltage connected…to either the positive or the negative supply rail…to indicate which of the input voltages is higher.…If the voltage at the non-inverting input terminal is…higher than the inverting input terminal,…the comparator will output the voltage…from its positive supply rail.…
And if the voltage at the non-inverting input terminal is…the lower of the two, then the comparator will output…the negative supply rail voltage.…The comparator circuit works because…in the open-loop configuration the output voltage…from the op-amp will be equal to its open-loop gain…which is abbreviated as Ao times the difference…between the non-inverting input voltage…and the inverting input voltage.…As the non-inverting input voltage rises…above the inverting input, so the difference…
- 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 Appropriate for all
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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