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18 October, 11:16

A particular op amp using ±15-V supplies operates linearly for outputs in the range-14 V to+14 V. If used in an inverting amplifier configuration of gain - 100, what is the rms value of the largest possible sine wave that can be applied at the input without output clipping?

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  1. 18 October, 11:21
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    V (rms) = 98.99 mV ≅ 100 mV

    Explanation:

    Outputs = - 14 to + 14

    Gain = = 100

    We know that Gain = Output/Input

    so, to find out the input voltage:

    Input = Output/Gain

    = ±14/-100

    Input = 0.14 V

    This is the peak input voltage (Vpk) of the sine wave and the question is asking us to find the rms value.

    To calculate the rms value:

    V (rms) = V (pk) / √2

    = 0.14/√2

    = 0.09899

    = 98.99 mV

    V (rms) ≅ 100 mV
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