Design an inverting amplifier using an op-amp with a desired voltage gain of -10. If the input voltage (Vin) is 2V, calculate the feedback resistor (Rf) value needed to achieve the desired gain.
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To design an inverting amplifier with a desired voltage gain of -10, we can use the following formula:
Voltage gain = - (Rf/R1)
Since the voltage gain is given as -10, we can rearrange the formula to solve for Rf:
-10 = - (Rf/R1)
Simplifying further, we get:
Rf/R1 = 10
Now, let's assume R1 = 1kΩ (this can be any value, but it's commonly chosen to be 1kΩ). Substituting this value into the equation, we get:
Rf/1000Ω = 10
Rf = 10 * 1000Ω
Rf = 10kΩ
So, to achieve a voltage gain of -10 using an op-amp inverting amplifier with an input voltage of 2V, a feedback resistor (Rf) value of 10kΩ is needed.
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