Input offset measurements with a random LM324 out of my junkbox My 15year old Radio Shack 22-174B DVM handles it well, reading only 0.1mV with the leads shorted (see photo) –ideally it should read zero mV –your DVM may do better or perhaps it even has 10uV resolution.
Any error reflects the input offset voltage, and can be easily measured with a good DVM. The gain is unity (or 1) so that the voltage at the output is supposed to be exactly the same as the voltage on the non-inverting input. Virtually all garden variety op amps are stable in the voltage follower connection. Each of the op amps to be tested is wired as a voltage follower (output connected to the inverting input).
0 kommentar(er)
