Assume the op-amp below is used as a comparator circuit and that
the op-amp is powered by a bipolar
+/- 15 V power supply. If the reference voltage Vref = -9 V and the
input voltage is VI = 12 V,
determine the output voltage, VO, of the op-amp. Assume the
open-loop gain, A, is very large and
consider saturation effects. Include units in your answer.
Homework Answers
Since the op-amp acts as a comparator as there is no feedback connection. Output will be either (+Vcc or -Vee) depending on the input.
If input at positive terminal is greater than input at negative terminal, output will be +Vcc else -Vee.
Here input at negative terminal= 12v
at positive terminal = -9v
Since voltage at negative terminal is higher
Output Vo = -15v
Add Answer to:
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used at dc and very low frequencies. A closed-loop nominal gain 0f
-100 is desired. Specifications indicate the minimum value of dc
open-loop gain cannot exceed 0.1dB. Assume in the design of problem
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