The problem is that the expressions for v2 and V3 are required. I gave them in the figure above. Then I asked about the function of the two operational amplifiers. I am a little confused about this. Please give me some advice.
Maxwell 发表于 September 28, 2020
The first is a differential amplifier, which is used to measure the common-mode rejection ratio. By the way, it is also possible to measure the common-mode input range.
Vanessa 发表于 September 28, 2020
The second is an inverting operational amplifier, low-pass filter for suppression. I'm not quite sure about the specific application. It may be used to suppress the spikes in the frequency response of the first operational amplifier?
Angelina 发表于 September 28, 2020
The first differential amplifier, the second is an inverter, invert the first amplified signal.
