I have a sensor which outputs a normally distributed baseband signal with cut-off frequency of 100Hz, whose mean is ~1mV and variance is (0.1mV)2. I want to amplify it about x1000 times by using TL084 opamp (other three opamps the TL084 contains are already occupied for different functions).
I have a practical consideration on this circuit. The input signal is smaller than the input off-set voltage of the opamp which is given to be 3mV. Will this opamp successfully and precisely amplify my signal? If not, how do I increase precision of this circuit?
And how does the input offset voltage appear at the output (suppose that the input offset voltage s 3mV, the input signal is x(t) and the opamp output is y(t))?
a) 1000 times amplified along with the input signal. (i.e.; y(t) = 3V + 1000x(t))
b) Added at the output stage. (i.e.; y(t) = 3mV + 1000x(t))