For my following circuit, the input is sine wave. LA25P is a current sensor having a bandwidth of 200 kHz (-1dB). The R2-C5 low-pass filter is designed at 482 kHz.
However, if I have an input sine wave frequency of more than 40 kHz, I get a distorted sine wave after R3 or after the 2nd stage output of the op-amp. There are two op-amps here with unity gain. The output at the R4-R6 junction is good at or below 45 kHz, however, the final output is only good at <=10 kHz. What's wrong here? I want the final output at TP2 to be undistorted even for 50 kHz input frequency.