TPC and TMC Feedback Compensation for Power Amplifiers

Bob Cordell explored power amp compensation techniques that allow the designer to employ more feedback loop gain at higher frequencies, improving amplifier linearity at higher frequencies. Two-Pole Compensation and Transitional Miller Compensation are the two techniques Bob is treating in this article. He describes the theoretical background, comparative simulation results and detailed design guidelines. He concludes that such techniques can give up to 20dB more loop gain at 20kHz with an accompanying reduction in distortion at the top octave, without compromising amplifier stability.