Find the output voltage Vo in the figure

Find the output voltage Vo in the figure Find the output voltage Vo in the figure

Right Answer is:

10V

SOLUTION

Since the above circuit is an Inverting amplifier op-amp circuit, so the voltage gain will be:

Vo/Vi = -RF/R1

  • Vo is the output voltage of the op-amp.
  • Vi is the input voltage to the op-amp.
  • RF is the feedback resistor connected between the output and the inverting input of the op-amp.
  • R1 is the input resistor connected between the input voltage source and the inverting input of the op-amp.

Vo/3= -20/-5

Vo/3= 12

  • The calculated ideal output voltage (12V) exceeds the positive saturation voltage (+10V) of the op-amp. This is an important point.
  • Due to saturation, the op-amp cannot output a voltage beyond its saturation limits. In this case, even though the ideal output would be 12V, the actual output will be clamped to the positive saturation voltage (+10V).
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