<p> </p><p>I detta examensarbete har metoder för design av en FPGA-baserad PCM-till-PWM-modulator för klass D-audioförstärkare testats och utvärderats. Rapporten diskuterar med stöd av matematisk analys och simuleringar interpoleringsmetoder, pulsbreddsmodulering, samplingsprocesser och sigma-delta-modulatorer. Den föreslagna designen bygger på uppsampling, förkompensering, brusformning och pulsbreddsmodulering. Designens prestanda har verifierats genom simulering av modell och implementering i hårdvara.</p><p> </p> / <p> </p><p>This thesis experiments and evaluates methods for design of an FPGA based PCM-to-PWM modulator to be used in a class D audio amplifier. By utilizing mathematical analysis and simulations interpolation methods, pulse width modulation, cross point derivers and sigma delta modulators are discussed. The proposed design consists of upsampling, predistortion, noise shaping and pulse width modulation. The design has been validated through model based simulation and implementation in hardware.</p><p> </p>
| Identifer | oai:union.ndltd.org:UPSALLA/oai:DiVA.org:liu-19488 |
| Date | January 2009 |
| Creators | Eriksson, Christer, Lindahl, Erik |
| Publisher | Linköping University, Department of Electrical Engineering, Linköping University, Department of Electrical Engineering |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | Swedish |
| Type | Student thesis, text |
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