12V Delta-Sigma Class-D Audio Amplifier

  • Hussein Ballan
  • Michel Declercq


Among the various existing medium- and low-power system applications, where a full high-voltage integrated circuit solution can be used, there is a limit beyond which the SVX technique loses its advantages with respect to dedicated technologies. The class-D audio amplifier presented in this chapter is a typical medium power application suited for this purpose. In addition to the power limit considerations, this chapter points Out the flexibility of this approach in combining low-voltage signal processing and high-voltage features. In fact, the low-voltage part of the amplifier consists of a delta-sigma (Δ-Σ) modulator and some protection features,.such as over-temperature and over-current detection cells.


Switching Frequency Total Harmonie Distortion Noise Floor Power Device Input Amplitude 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [16]
    J. C. Candy, G. C. Themes “Oversampling Delta-Digma Data Converters” IEEE Press, 1992Google Scholar
  2. [17]
    P. M. Aziz, K. V. Sorensen, J. V. D. Spiegel “An overview of Sigma-Delta Converters” IEEE Sig. Process. Magazine., pp. 61–84, January 1996Google Scholar
  3. [18]
    V. Friedman, “The Structure of Limit Cycles in Sigma Delta modulation”, IEEE Trans. On Communications,pp. 972–979, August,1988Google Scholar
  4. [19]
    J. Candy, O. Benjamin, “The Structure of Quantization noise from Sigma-Delta Modulation”, IEEE Trans. On Communications,pp. 1316–1323, September,1981Google Scholar
  5. [20]
    R. Gray, “Spectral analysis of quantization noise in a single-loop sigma-delta modulator with DC input”, IEEE Trans. On Communications,pp. 588–599, June,1989Google Scholar
  6. [21]
    R. Gray, “Quantization noise spectra”, IEEE Trans. On Information Theory,pp. 12201244, November,1990Google Scholar
  7. [22]
    S. Norsworthy, D. Rich “Idle channel tones and dithering in delta sigma modulators” 95’ h Convention of the Audio Engineering Society, pre-print 3711, October 1993Google Scholar
  8. [23]
    D. G. Haigh, B. Singh “Switching scheme for switched capacitor filters which reduces the effect of parasitic capacitances associated with switch control terminals”, IEEE ISCAS proceedings, pp. 586–589, April 1983Google Scholar
  9. [24]
    K. Lee, R. G. Mayer “Low-distortion switched capacitor filter design techniques” IEEE Journal of Solid State Circuits, Vol. SC-20, No. 6, pp. 1103–1113, December 1985CrossRefGoogle Scholar
  10. [25]
    SMASH simulator, Dolphin Integration, Meylan Cedex, FranceGoogle Scholar
  11. [26]
    R. Castello, P. R. Gray “A high performance micropower switched capacitor filter” IEEE Journal of Solid State Circuits, Vol. SC-20, No. 6, pp. 1122–1132, December 1985CrossRefGoogle Scholar
  12. [27]
    H. Ballan, M. Declercq, “12V A-E Class-D Amplifier in 5V CMOS Technology”, CICC proceedings, paper 26. 5, May 1995Google Scholar
  13. [28]
    J. M. Goldberg, M. B. Sandler “ Noise Shaping and Pulse Width Modulation for an All-Digital Audio Power Amplifier”, Journal of Audio Eng. Soc., Vol. 39, No. 6, June 1991Google Scholar
  14. [29]
    M. O. J. Hawksford “ Dynamic Model-Based Linearization of Quantized Pulse-Width Modulation for Applications in Digital-to-Analog Conversion and Digital Power Amplifier System”, Journal of Audio Eng. Soc., Vol. 40, No. 4, April 1992Google Scholar
  15. [30]
    J. Hancock “ A Class D Amplifier Using MOSFETs with Reduced Minority Carrier lifetime”, Journal of Audio Eng. Soc., Vol. 39, No. 9, September 1991Google Scholar
  16. [31]
    D. A. Grant, J. Gowar, “Power MOSFETs Theory and Applications”, John Wiley and Sons, pp. 313–319, 1989Google Scholar
  17. [32]
    B. E. Attwood, “Design Parameters Important For Optimization of very High Fidelity (Class D) Audio Amplifiers”, Proceedings Cony. Audio Eng. Soc.,71 s ` (1982)Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1999

Authors and Affiliations

  • Hussein Ballan
    • 1
  • Michel Declercq
    • 1
  1. 1.Swiss Federal Institute of TechnologyLausanneSwitzerland

Personalised recommendations