Distortions by switching errors in digital power amplifiers using sigma delta coded signals

R. Esslinger; G. Gruhler; R.W. Stewart

Distortions by switching errors in digital power amplifiers using sigma delta coded signals

R. Esslinger, G. Gruhler, R.W. Stewart

Electronic And Electrical Engineering

Research output: Contribution to conference › Paper

Abstract

The development of a fully digital audio power amplifier based on PWM or Sigma Delta technologies still has many unsolved practical problems. The most problematic part of the amplifier system is the switching (class-D) power stage. It is extremely difficult to turn on or off the high power voltage impulses as required for a high performance signal quality (e.g. 16 bit CD quality). In this paper the typical switching errors introduced by the power transistors, the power supply voltage and the load will be analysed formally and with computer simulations. From the results it can be seen, that a degrading of the Signal-to-Noise quality by harmonic distortions and unwanted modulation products occur by the signal errors in the output stage

Original language	English
Pages	5633
Publication status	Published - Apr 2002
Event	Signal Processing Forum 2002 - Munich, Germany Duration: 10 May 2002 → 13 May 2002

Conference

Conference	Signal Processing Forum 2002
Country/Territory	Germany
City	Munich
Period	10/05/02 → 13/05/02

Keywords

digital audio power
amplifier
sigma delta technologies
class-d
power stage

Cite this

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title = "Distortions by switching errors in digital power amplifiers using sigma delta coded signals",

abstract = "The development of a fully digital audio power amplifier based on PWM or Sigma Delta technologies still has many unsolved practical problems. The most problematic part of the amplifier system is the switching (class-D) power stage. It is extremely difficult to turn on or off the high power voltage impulses as required for a high performance signal quality (e.g. 16 bit CD quality). In this paper the typical switching errors introduced by the power transistors, the power supply voltage and the load will be analysed formally and with computer simulations. From the results it can be seen, that a degrading of the Signal-to-Noise quality by harmonic distortions and unwanted modulation products occur by the signal errors in the output stage",

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T1 - Distortions by switching errors in digital power amplifiers using sigma delta coded signals

AU - Esslinger, R.

AU - Gruhler, G.

AU - Stewart, R.W.

PY - 2002/4

Y1 - 2002/4

N2 - The development of a fully digital audio power amplifier based on PWM or Sigma Delta technologies still has many unsolved practical problems. The most problematic part of the amplifier system is the switching (class-D) power stage. It is extremely difficult to turn on or off the high power voltage impulses as required for a high performance signal quality (e.g. 16 bit CD quality). In this paper the typical switching errors introduced by the power transistors, the power supply voltage and the load will be analysed formally and with computer simulations. From the results it can be seen, that a degrading of the Signal-to-Noise quality by harmonic distortions and unwanted modulation products occur by the signal errors in the output stage

AB - The development of a fully digital audio power amplifier based on PWM or Sigma Delta technologies still has many unsolved practical problems. The most problematic part of the amplifier system is the switching (class-D) power stage. It is extremely difficult to turn on or off the high power voltage impulses as required for a high performance signal quality (e.g. 16 bit CD quality). In this paper the typical switching errors introduced by the power transistors, the power supply voltage and the load will be analysed formally and with computer simulations. From the results it can be seen, that a degrading of the Signal-to-Noise quality by harmonic distortions and unwanted modulation products occur by the signal errors in the output stage

KW - digital audio power

KW - amplifier

KW - sigma delta technologies

KW - class-d

KW - power stage

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T2 - Signal Processing Forum 2002

Y2 - 10 May 2002 through 13 May 2002

ER -