An OP-AMP comparator is a circuit that compares the signal voltage on one of its inputs with a ______________?
Correct answer: B. Reference voltage on the other
- A. Non-inverting voltage at output
- B. Reference voltage on the other
- C. Virtual input
- D. Output
Explanation
An op-amp comparator compares the voltage applied to one input with a reference voltage applied to the other input, and its output indicates which is larger. Option d is tempting because the output changes as a result of the comparison, but the output is not the voltage used as the reference.
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About PN Junction
A PN junction forms when p type and n type semiconductor regions meet, creating a depletion layer and a potential barrier. The topic covers forward and reverse bias, diode current voltage characteristics, breakdown and rectification, while distinguishing an ordinary junction diode from a transistor formed from multiple junctions.
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