K
Klaus Kragelund
- Jan 1, 1970
- 0
Hi
I have an application in which I need to amplify a signal say 100times.
The opamp is a LM324 with ~5mV offset voltage. If I do nothing the
output might be 500mV off target
I plan to calibrate the op-amp continously by using a switch to set the
input to 0mV (instead of the signal) and then sample the resulting
voltage with the microcontroller to store a calibration number.
That might be fine a that cures any drift the Vos has over time and
temperature.
But what about non-linearities of the offset versus the input signal
range? Will the Vos be the same for say a 0V input and a 5V input?
Thanks
Klaus
I have an application in which I need to amplify a signal say 100times.
The opamp is a LM324 with ~5mV offset voltage. If I do nothing the
output might be 500mV off target
I plan to calibrate the op-amp continously by using a switch to set the
input to 0mV (instead of the signal) and then sample the resulting
voltage with the microcontroller to store a calibration number.
That might be fine a that cures any drift the Vos has over time and
temperature.
But what about non-linearities of the offset versus the input signal
range? Will the Vos be the same for say a 0V input and a 5V input?
Thanks
Klaus