Are amplifiers AC or DC?

Related questions

1. What is ideal op amp?
2. Can we amplify DC signal?
3. Why is IC timer called 555?
4. Do resistors lower voltage or current?
5. What is the difference between amplifier and operational amplifier?
6. What happens when a resistor goes bad?
7. Why feedback is used in op amp?
8. Why is it called IC 741?
9. What is offset null IC 741?
10. How does negative feedback work in op amps?

Tags

1. #called
2. #other
3. #whole
4. #parts
5. #creates
6. #mixed
7. #amplifiers
8. #sound
9. #offset
10. #amplify
11. #music
12. #noise
13. #signal
14. #usually
15. #problems
16. #engineers
17. #voltage
18. #steady