Hello all I am currently working on a project centered around the XR-2206 function generator IC. I am trying to add some extra functionality to the circuit by adding gain and DC offset to the output. I know the IC has this capability but after experimentation I didnt really like the way it behaved.
To give you all an idea of what I am doing is that I have one op amp acting as the gain another as the DC offset using a voltage follower and finally a third summer op amp to combine the two. My problem is when I add the DC offset things don't go like I want them to so I was thinking that I needed to couple the output of the gain circuit from the DC offset by adding a cap but again my results were not what I wanted. I am simulating right now using a quad package 2274 because the rest of the circuit is run off of +5 and -5 volts. I have attached a schematic so you can get an idea of what I am trying to do. Also after looking at the data sheet I realize that the 2274 isnt going to cut it with its response times but I am just experimenting right now in order to get concept down.
If this is a double post I apologize last time I tried to start this thread my connection timed out and I dont know if it went through.
To give you all an idea of what I am doing is that I have one op amp acting as the gain another as the DC offset using a voltage follower and finally a third summer op amp to combine the two. My problem is when I add the DC offset things don't go like I want them to so I was thinking that I needed to couple the output of the gain circuit from the DC offset by adding a cap but again my results were not what I wanted. I am simulating right now using a quad package 2274 because the rest of the circuit is run off of +5 and -5 volts. I have attached a schematic so you can get an idea of what I am trying to do. Also after looking at the data sheet I realize that the 2274 isnt going to cut it with its response times but I am just experimenting right now in order to get concept down.
If this is a double post I apologize last time I tried to start this thread my connection timed out and I dont know if it went through.