B
Boris
Hello
I'm working on a project using a load cell that needs to amplify a low
signal with a very large gain. I have, for exemple, 2 stages of gain.
The first(using an instrumentation amplifier) the gain is set to 500x.
The second gain (using an opamp) is 20x. The problem is that if I
increase too much the gain, there are a lot of interference. If my hand
gets closer to the device it increases 1V, and Im supposed to have a
precision circuit! I've read about ground loops and stuff, but is there
anything someone can suggest to have a high gain unity without
interference? Is some kind of isolation needed?
Thanks a lot
Boris
I'm working on a project using a load cell that needs to amplify a low
signal with a very large gain. I have, for exemple, 2 stages of gain.
The first(using an instrumentation amplifier) the gain is set to 500x.
The second gain (using an opamp) is 20x. The problem is that if I
increase too much the gain, there are a lot of interference. If my hand
gets closer to the device it increases 1V, and Im supposed to have a
precision circuit! I've read about ground loops and stuff, but is there
anything someone can suggest to have a high gain unity without
interference? Is some kind of isolation needed?
Thanks a lot
Boris