Linearization Techniques for Push-Pull Amplifiers

Rinaldo Castello

Rinaldo Castello

(University of Pavia)

Play Video (Stanford)

Play Video (SystemX Members)

❏ Lecture Slides (Stanford)

❏ Lecture Slides (SystemX Members)

Date: February 4, 2016


Amplifiers that need to drive heavy loads (low resistances and/or large capacitances) with good efficiency generally use a push-pull output stage. This intrinsically creates large open-loop distortion components that need to be compressed through feedback to insure high closed-loop linearity. Minimizing close loop residual distortion involves three steps that will be discussed in the talk. Eliminate all open-loop source of distortion not intrinsic to the operation of the push pull structure. Second, choose the amplifier topology that gives the maximum close loop compression of the open-loop distortion components for a given bandwidth. Third, maximize the unity gain bandwidth of the amplifier for a given topology while insuring stability in the presence of variable loads.

Further Information:

Rinaldo Castello (S’78–M’78–SM’92–F’99) graduated from the University of Genova (summa cum laude) in 1977 and received the M.S. and the Ph. D. from the University of California, Berkeley, in ‘81 and ‘84. From ‘83 to ‘85 he was Visiting Assistant Professor at the University of California, Berkeley. In 1987 he joined the University of Pavia where he is now a Full Professor.

Created: Wednesday, February 10th, 2016