Error-feedback for amplifier linearization

A novel general linearization topology called `error-feedback´ is presented and applied to the linearization of amplifiers. Error-feedback uses the difference/error between (linearly) scaled input and output signal in its feedback loop to reduce nonlinearity. It does not rely on main-amplifier gain for linearization as does traditional feedback. Instead an auxiliary amplifier is introduced into the feedback loop, leaving the main amplifier´s linear gain unaffected. Results from theory, and simulation as well as measured results complement each other. They show that linearization takes place over a continuous band. The topology shows prospects for concurrent multi-band linearization. Internal delay and phase shifts influence design limits and overall performance