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Thanks! You are correct about the DC offset. It's a 5V system so that makes sense.
Do you know the gain of each stage? I guess it would be (-R27/R28) but I"m sure that cap play a role as well. I'll take a look online and maybe I'll find it there. Thanks
-mike
I wrote the 2.5V as that is the voltage at that point in the circuit. Supply voltage is +5V and GND.
Is it safe to assume that if X_IN is at zero volts then the op amps will always output 2.5 volts. It's only when X_IN goes > 0 volts it actually starts to amplify?
Here this is where the circuit is from. I'm a little confused but perhaps this schematic will help make things a bit clearer.
I'm amplifying X and Y from a transducer for a joystick type of app. You put a force on the transducer and it will spit out a small x, y voltage. I need to amplify these signals to be read by a micro so you have better resolution.
With a 2.5V offset, the signals must also be referenced to that same voltage. Thus "0V" in must actually be 2.5V; V_NULL is the virtual ground point.