Abstract: An amplifier calibration system has a calibration controller, a comparator coupled between an amplifier to be tested and the calibration controller, and an analog test signal generator driven by the calibration controller and coupled to the amplifier input. The system applies a cycle of analog tests to the amplifier input. The cycle has an upward path and a downward path. The upward path includes three signal levels: lowest, medium low, and medium high. The downward path includes: highest, medium high, and medium low. The comparator determines successive polarities of the amplifier's responses to the cycle of analog tests. Based on the polarities, the system determines amplifier characteristics, and calibrates amplifier parameters to change the amplifier characteristics to desired values. Characteristics may include hysteresis, offset, input range values, and other amplifier specifications.