EPOT Applications: Offset Adjustment in Op-Amp Circuits

Abstract: In some electronic systems, a DC offset voltage at the inputs will contribute a significant error to the output. This is especially true in high gain configurations. An offset adjustment circuit can be added to "null" out the offset voltage, making high gain stages practical even with significant input offset voltages found in op amp circuits.
Maxim > App Notes > Amplifier and Comparator Circuits Digital Potentiometers

Keywords: offset adjust, offset adjustment, op amp, nulling circuits, nulling op amps, DC offset voltage, Sep 17, 2001
opamps

APPLICATION NOTE 803
EPOT Applications: Offset Adjustment in Op-Amp Circuits

Abstract: In some electronic systems, a DC offset voltage at the inputs will contribute a significant error to the
output. This is especially true in high gain configurations. An offset adjustment circuit can be added to "null"
out the offset voltage, making high gain stages practical even with significant input offset voltages found in op
amp circuits.

Electronic Potentiometers (EPOTS) offer designers the opportunity to control a resistance via a digital interface
and can be used in place of mechanical