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An audio band low voltage CT-ΔΣ modulator with VCO-based quantizer

Yousefzadeh, B ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/ICECS.2011.6122256
  3. Abstract:
  4. This paper presents the design and implementation of a low power, low voltage, continuous time delta sigma modulator for audio band in 90 nm CMOS technology. A VCO-based integrator and quantizer are used. Inherent dynamic element matching (DEM) of the quantizer eliminates the need for explicit DEM logic which results in a short excess-delay and power saving. Simulation results show that the modulator achieves 78 dB SNDR and 87 dB SNR in a 20 kHz input bandwidth and dissipates 106 μW from 1 V supply. The power consumption for different parts is discussed
  5. Keywords:
  6. Audio bands ; CMOS technology ; Continuous time ; Delta sigma modulator ; Dynamic element matching ; Low Power ; Low voltages ; Power savings ; Quantizers ; Audio systems ; CMOS integrated circuits ; Continuous time systems ; Delta sigma modulation ; Low power electronics ; Variable frequency oscillators ; Modulators
  7. Source: 18th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2011, 11 December 2011 through 14 December 2011 ; December , 2011 , Pages 232-235 ; 9781457718458 (ISBN)
  8. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6122256