Hi,
Where did you get that graph of the CMRR from for the 741 ?
The data sheets all say 70db min, so something else must be wrong. Did you null the amplifier before taking the readings? That op amp requires a 10k pot connected to the null terminals and the arm goes to the minus power supply (V-).
After nulling check again if you did not null it yet.
Where did you get that graph of the CMRR from for the 741 ?
The data sheets all say 70db min, so something else must be wrong. Did you null the amplifier before taking the readings? That op amp requires a 10k pot connected to the null terminals and the arm goes to the minus power supply (V-).
After nulling check again if you did not null it yet.