Question

In the op-amp amplifier circuit shown below, the magnitude of voltage gain is 10.5



If the input signal, which is a sinusoidal one, has a peak amplitude varying from (100 -300) mV, then the maximum possible input signal frequency that would be faithfully amplified is (The slewrate of op-amp is 0.5 V/$\mu$s)

• A. 29.16 kHz
• B. 26.52 kHz
• C. 30.14 kHz
• D. 20.14 kHz

Answer 1

The correct option is B 26.52 kHz

The largest input signal amplitude = 300 mV
Corresponding output signal $=300\times {10}^{-3}\times 10$
$V_{0max}=3V$
Highest sinewave frequency that would be faithfully amplified is
$f_{max}=\frac{SR}{2\pi V_{0\left(max\right)}}=\frac{0.5}{2\pi \times 3\times {10}^{-6}}$
= 26.52 kHz