Negative feedback
A) is used only in operational amplifier circuits
B) provides a signal at the input that is in phase with the output
C) is critical for the operation of electronic oscillators
D) provides a signal at the input that is 180 out of phase with the input
Question 2
The most common crystals used in oscillators are
A) Hartley crystals B) quartz crystals
C) silicon crystals D) germanium crystals