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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한전자공학회 JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE Journal of Semiconductor Technology and Science Vol.14 No.1
- 발행연도
- 2014.2
- 수록면
- 109 - 116 (8page)
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This paper presents a high-efficiency digital class-D audio amplifier using a composite interpolation filter for portable audio devices. The proposed audio amplifier is composed of an interpolation filter, a delta-sigma modulator, and a class-D output stage. To reduce power consumption, the designed interpolation filter has an optimized composite structure that uses a direct-form symmetric and Lagrange FIR filters. Compared to the filters with homogeneous structures, the hardware cost and complexity are reduced by about half by the optimization. The coefficients of the digital deltasigma modulator are also optimized for low power consumption. The class-D output stage has gate driver circuits to reduce shoot-through current. The implemented class-D audio amplifier exhibited a high efficiency of 87.8 % with an output power of 57 mW at a load impedance of 16 6 and a power supply voltage of 1.8 V. An outstanding signal-to-noise ratio of 90 dB and a total harmonic distortion plus noise of 0.03 % are achieved for a single-tone input signal with a frequency of 1 kHz.
목차
Abstract
Ⅰ. INTRODUCTION
Ⅱ. DESIGN OF DIGITAL CLASS-D AUDIO AMPLIFIER
Ⅲ. EXPERIMENTAL RESULTS
Ⅳ. CONCLUSIONS
REFERENCES
참고문헌 (15)
참고문헌 신청
1. [학술지(정기간행물)] - V. Adrian / 2009 / A lowvoltage micropower digital class-D amplifier modulator for hearing aids / IEEE Trans. Circuits Syst. Ⅰ, Reg. Papers 56 (2) : 337 ~ 349
2. [학술지(정기간행물)] - K. Kang / 2008 / Class-D audio amplifier using 1-bit fourthorder delta-sigma modulation / IEEE Trans. Circuits Syst. Ⅱ, Exp. Briefs 55 (8) : 728 ~ 732
4. [학술지(정기간행물)] - T. Ge / 2008 / Bang-Bang control Class D amplifiers: Power-supply noise / IEEE Trans. Circuits Syst. Ⅱ, Briefs 55 (8) : 723 ~ 727
5. [학술지(정기간행물)] - M. T. Tan / 2003 / An investigation into the parameters affecting total harmonic distortion in low-voltage low-power Class-D amplifiers / IEEE Trans. Circuits Syst. Ⅰ, Fundam. Theory Appl. 50 (10) : 1304 ~ 1315
6. [학술지(정기간행물)] - M. Berkhout / 2003 / Integrated 200-W class-D audio amplifier / J. Solid-State Circuits 38 (7) : 1198 ~ 1206
2. [학술지(정기간행물)] - K. Kang / 2008 / Class-D audio amplifier using 1-bit fourthorder delta-sigma modulation / IEEE Trans. Circuits Syst. Ⅱ, Exp. Briefs 55 (8) : 728 ~ 732
4. [학술지(정기간행물)] - T. Ge / 2008 / Bang-Bang control Class D amplifiers: Power-supply noise / IEEE Trans. Circuits Syst. Ⅱ, Briefs 55 (8) : 723 ~ 727
5. [학술지(정기간행물)] - M. T. Tan / 2003 / An investigation into the parameters affecting total harmonic distortion in low-voltage low-power Class-D amplifiers / IEEE Trans. Circuits Syst. Ⅰ, Fundam. Theory Appl. 50 (10) : 1304 ~ 1315
6. [학술지(정기간행물)] - M. Berkhout / 2003 / Integrated 200-W class-D audio amplifier / J. Solid-State Circuits 38 (7) : 1198 ~ 1206
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