current feedback amplifier

OA-31_current feedback amplifiersCurrent Feedback Amplifiers

Current Feedback Amplifiers
In their effort to approximate the ideal op amp, manufacturers must not only maximize the open-loop gain and minimize input-referred errors such as offset voltage, bias current, and noise, but must also ensure adequate band-width and settling-time characteristics. Amplifier dynamics are particularly important in applications like high-speed DAC buffers, subranging ADCs, S/H circuits, ATE pin drivers, and video and IF drivers (Reference 1) Being basically voltage-processing devices, op amps are subject to the speed limitations inherent to voltage-mode operation, stemming primarily from the stray capacitances of nodes and the cutoff frequencies of transistors. Particularly severe is the effect of the stray capacitances between the inpu