Evaluation of 100 A, 100 kHz transconductance amplifiers

This paper presents experimental evaluation of the performance of more than 25 production units of a 100 A, DC to 100 kHz transconductance amplifier. In addition to the stability, uncertainty, distortion, and frequency response, experimental results seem to indicate that the output impedance may be closely modeled by a parallel combination of a resistor and a capacitor in series with a resistor. This model is then used to estimate, and to correct for, the effect of load inductance on high-frequency, high-current measurements.