About the pressure sensor acquisition signal is small, to filter amplification, to get useful signals, is it usually first amplification or first filter?

Is the amplification circuit active or passive? Can I use the operational amplifier? Differential amplification? Thank you. I'm still a college student. I don't know much about it. Thank you

Electrical, then there is a transmitter specializing in non-standard signal conversion standard signal, op amp is also, of course, the active, and amplification with single end amplification more convenient, you try it.

The output signal of an active and general pressure sensor is the differential pressure signal of the bridge circuit. Some standard circuits are built with 3 operational amplifiers, which can realize the functions of zero modulation, amplitude modulation and differential amplification, and some can be adjusted linearlyFiltering is usually a low-pass filter is enough, or do not have a special design, in front of you can,Simple, you can make an instrument amplifier, you can control the zero point, adjust the full range of output, you can

Zoom in, then filter, because the signal is small, itself is not good filter, and the amplifier itself also has noise, so after the filter can filter out the amplifier noise.Amplifying circuits are much better than active ones, and amplify them with differential amplification to suppress common mode interference. In fact, the amplification is also filtering, you can refer to some of the circuit, it is found that the circuit active filter also has amplification function.You can choose to use OP07 chip, cheap, noise is also small.