Hey, I have a Wheatstone bridge, and I plan on using a differential amplifier. The frequency of the signal that I am using is around 400kHz, sine wave.
I created a differential amplifier using a general purpose op-amp, and found out that I need to use higher resistance of around 300Kohm in order to not affect the input signal.
I have looked at most differential amplifier online, and found out that at higher frequency bandwidth, the differential amplifier uses lower resistance as shown below.
Is there a differential amplifier that uses resistance of above 100kohm for 400Khz signal operation?