Q346
An OPAMP-based comparator drives an LED, with VF = 1.6V, the current through which is regulated by a 1 kΩ resistor and a silicon diode in series. Assume a ±10V DC voltage is applied as ±VCC respectively to the op-amp. Then find out the current through the LED when the comparator output is +10V.
A.
5.4 mA
B.
8.5 mA
C.
7.7 mA
AnswerD.
6.7 mA
Answer: Option C
Solution
Answer: Option C
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