Dissertation > Excellent graduate degree dissertation topics show

Research and Design of Digital Pulse Width Modulator in Class D Audio Power Amplifier

Author: LiuNing
Tutor: LaiXinQuan
School: Xi'an University of Electronic Science and Technology
Course: Circuits and Systems
Keywords: Class D Audio Power Amplifier Pulse Width Modulation Digital Audio Processing Sample Rate Conversion Shaping Noise
CLC: TN761
Type: Master's thesis
Year: 2012
Downloads: 42
Quote: 1
Read: Download Dissertation

Abstract


Taking the project "Theoretical Research on Key Techniques and Integrated Design of High Performance Stereo Class D Audio Power Amplifier" as background, a digital pulse width modulation solution in Class D audio power amplifier is presented based on the study of the principle of the Class D audio power amplifier and digital audio processing technology. The solution converts digital audio signal to pulse-width-modulated signal in digital environment without DAC and reduces the cost and difficulty for the realization of Class D audio power amplifier with digital signal input.Firstly, the working principle and characteristics of various audio power amplifiers are introduced in the paper. Then, the key techniques of the solution are analyzed thoroughly. On the basis of system structure discussion, the digital pulse width modulator is designed on the RTL in Verilog HDL. To improve performance, the modulator, working at98.304MHz clock domain, up-samples the input signal and shapes noise by integrating sample rate convertor and sigma-delta modulator. And three-level modulation mode, using triangle wave as a carrier, is conformed for the modulator. Furthermore, the synthesis, timing analysis and layout are done with2.5V0.25μm CMOS standard cell library.The simulation and verification are completed with the EDA tools such as ModelSim, Matlab etc. According to the simulation results, the function and performance of the digital pulse width modulator have met all the requirements.

Related Dissertations

  1. Direct Torque Control of Winding Induction Motor,TM343
  2. The Development about Control System of Slack Turning Machine and Vector Control Simulation of Asynchronous Machine,TQ440.5
  3. TEC Semiconductor Industrial Air Conditioner Control System,TB657.2
  4. Chaos Synchronization and Chaos Control of Permanent Magnet Synchronous Motor,TM301.2
  5. Design of Wiper Control System for Locomotive,U260.39
  6. The Research of SVPWM Modulation Method in Three-phase Inverter,TM464
  7. Control Chip Design of Flyback Converter,TM46
  8. One kind of PWM mode DC / DC buck converter Research and Design,TM46
  9. The Reasearch for Three-phase System Frequence and Phase Track Based on DSP,TM464
  10. Simulation of Flexible HVDC Transmission System,TM721.1
  11. Research on Synchronization Technology of Shortwave Burst Signals and Its DSP Realization,TN925
  12. The Applied Study of Multi-level Inverter in the Photovoltaic Generation System,TM464
  13. A high efficiency and low distortion class-D audio power amplifier chip design and implementation,TN722.75
  14. The Research and Design of Class-D Audio Power Amplifier,TN722.75
  15. Application Study on Audio Power Amplifier Used in Laptop Computer,TP368.32
  16. No filtering 2.5W D audio power amplifier design,TN722.75
  17. Design of a Programmable SPWM Inverter Controller Based on FPGA,TM464
  18. Design on Megawatt-class Wind Power Inverter,TM464
  19. Research of Power Electronic Control Technology Based on SOPC,TM1
  20. Research on an Optimized Modulation Arithmetic of Multilevel Inverters,TM464
  21. Research and Implementation of Digital Audio Device,TN912.2

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Modulation technique and the modulator,demodulator and the demodulator > Modulation technique and the modulator
© 2012 www.DissertationTopic.Net  Mobile