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DESIGN OF A HIGH-POWER, HIGH-EFFICIENCY, LOW-DISTORTION DIRECT FROM DIGITAL AMPLIFIER

Earick, Weston R.
http://rave.ohiolink.edu/etdc/view?acc_num=wright1155008919

Abstract Details

2006, Master of Science in Engineering (MSEgr), Wright State University, Electrical Engineering.
For the process of converting low-power digital signals into their high-power analog counterparts, the functions of digital-to-analog conversion (at low power) and analog power amplification are separately implemented. This thesis proposes a new “STAC-DAC” circuit topology which directly realizes high-power analog output from low-power digital input signals. The ability to achieve a “direct from digital” high-power analog output in a single high-efficient, low-distortion design has significant potential in audio reproduction, and flexible signal generation applications. In this thesis, the “STAC-DAC” is described and its implementation via MATLAB and LTSpice is discussed. The results of simulations are used to prove the concept of the design. The 16-bit design features a high-power output of 100 watts or more at an efficiency of 93%. The design is optimized to feature low total harmonic distortion (THD) of 0.055% for a 1 kHz signal at 100 watts into an 8 Ω load and low phase distortion of less than 10° for a 20 kHz signal and only 1° at 1 kHz. The “STAC-DAC” design is applicable to any design which requires a high-power analog output that is controlled by a logic level digital input. The results validated that the “STAC-DAC” can produce low-level THD figures over the audio frequency range. If very low THD figures are not necessary, high-power analog operation can be achieved into the hundreds of kilohertz while maintaining high efficiency. These results show that the power “STAC-DAC” is capable of simultaneously achieving the highly efficient circuitry associated with digital-to-analog converters with the low harmonic and phase distortion requirements associated with high fidelity analog audio amplifiers.
Marian Kazimierczuk (Advisor)
137 p.
high-power; high-efficiency; low-distortion; direct from digital; digital amplifier; amplifier; digital-to-analog converter; DAC; audio; total harmonic distortion; THD; high-fidelity

Recommended Citations

Citations

  • Earick, W. R. (2006). DESIGN OF A HIGH-POWER, HIGH-EFFICIENCY, LOW-DISTORTION DIRECT FROM DIGITAL AMPLIFIER [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1155008919

    APA Style (7th edition)

  • Earick, Weston. DESIGN OF A HIGH-POWER, HIGH-EFFICIENCY, LOW-DISTORTION DIRECT FROM DIGITAL AMPLIFIER. 2006. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1155008919.

    MLA Style (8th edition)

  • Earick, Weston. "DESIGN OF A HIGH-POWER, HIGH-EFFICIENCY, LOW-DISTORTION DIRECT FROM DIGITAL AMPLIFIER." Master's thesis, Wright State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=wright1155008919

    Chicago Manual of Style (17th edition)

wright1155008919
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© 2006, all rights reserved.
This open access ETD is published by Wright State University and OhioLINK.