Hello, I'm trying to replace a signal in a circuit with a different one that is much lower. So I was just going to amplify the signal at first. The problem is that there are different variable resistors changing the range and value of the signals differently, so my needed gain is different in several cases.
For example:
Having my pot set to "1" gives me a voltage of -0.035, which I need to amplify to 0.449, but having my pot set to "7" gives me a voltage of -0.065, which I need to amplify to 4.6 volts. The pot settings just correspond to the number on a dial, I was just using it as a reference. But as you can see, the gain needed is different depending on where the pot is. And those values can change because there are other variable resistors changing them.
So my question is, can I use a variable gain amplifier of some sort that is based on input voltage to do this? How would you guys go about this? Thanks so much for any help.
For example:
Having my pot set to "1" gives me a voltage of -0.035, which I need to amplify to 0.449, but having my pot set to "7" gives me a voltage of -0.065, which I need to amplify to 4.6 volts. The pot settings just correspond to the number on a dial, I was just using it as a reference. But as you can see, the gain needed is different depending on where the pot is. And those values can change because there are other variable resistors changing them.
So my question is, can I use a variable gain amplifier of some sort that is based on input voltage to do this? How would you guys go about this? Thanks so much for any help.