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Closed loop class-D amplifier with nonlinear loop integrators | IEEE Conference Publication | IEEE Xplore

Closed loop class-D amplifier with nonlinear loop integrators


Abstract:

In many integrated class-D audio amplifiers large linear capacitors are used to create the triangular reference signals for generation of PWM signals. In this paper, an i...Show More

Abstract:

In many integrated class-D audio amplifiers large linear capacitors are used to create the triangular reference signals for generation of PWM signals. In this paper, an integrated class-D amplifier is presented that uses a control loop with area efficient nonlinear gate oxide capacitors. A model is used to show that the nonlinearity does not degrade the THD performance. A comparison with a similar control loop using linear capacitors is made. Measurements and simulations on two amplifiers with linear and nonlinear capacitors confirm that nonlinear capacitors do not introduce additional distortion.
Date of Conference: 14-18 September 2009
Date Added to IEEE Xplore: 10 November 2009
ISBN Information:
Print ISSN: 1930-8833
Conference Location: Athens, Greece

References

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