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Efficient performance simulation of class D amplifier output stages

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3 Author(s)
Nyboe, F. ; Digital Audio Dept., Tech. Univ. of Denmark, Lyngby, Denmark ; Risbo, L. ; Andreani, P.

Straightforward simulation of amplifier distortion involves transient simulation of operation on a sine wave input signal, and a subsequent FFT of the output voltage. This approach is very slow on class D amplifiers, since the switching behavior forces simulation time steps that are many orders of magnitude smaller than the duration of one period of an audio sine wave. This work presents a method of simulating the amplifier transfer characteristic using a minimum amount of simulation time, and then deriving THD from the results.

Published in:

NORCHIP Conference, 2005. 23rd

Date of Conference:

21-22 Nov. 2005

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