Paralleling decreases autozero- amplifier noise by a factor of two

摘要

Autozero amplifiers have almost zero drift and input-offset values of 1 to 20 μV. You can compensate for the initial voltage offset of an autozero amp in sensitive circuits, such as dc amplifiers and integrators, requiring thernprocessing of voltages of 10 μV to 1 mV. Total compensation down to an offset of 0V, however, is an illusion because residual low-frequency output noise is still present in any autozero amp.