I need to run a signal through a configuration so that it has a gain of 1/2. I'm trying to figure out what the best way to minimize the noise for a low frequency input. So far I've only really thought of 3 ways to do this: 1. Voltage divider into a voltage follower 2. Measure the input so that I get a negative voltage, and run it through a 1/2 inverting op amp 3. Run the input through an inverting op amp of -1 gain and then through another one of -1/2 gain I believe that, since the frequency is low, I can be very generous with the low pass filter afterwords. Price and (for the most part) power consumption are not factors here, only the accuracy of the signal. I'm pretty new to board level design so any advice would be helpful. Thanks!