Loading...

A low-power, second-order Δ/∑ modulator using a single class-AB op-amp for voice-band applications

Safarian, A ; Sharif University of Technology | 2006

25 Viewed
  1. Type of Document: Article
  2. DOI: 10.1007/s10470-006-9567-6
  3. Publisher: 2006
  4. Abstract:
  5. The design of a power-efficient second-order Δ/∑ modulator for voice-band is presented. At system level, a new single-loop, single-stage modulator is proposed. The modulator employs only one class-AB op-amp to realize a second-order noise shaping for voice-band applications. The modulator is designed in a 0.25μm standard CMOS process, and exhibits 86 dB dynamic range (DR) for a 4 kHz voice-bandwidth. The proposed modulator consumes 125μW from a 2.5 V supply. © Springer Science + Business Media, LLC 2006
  6. Keywords:
  7. Dynamic range (DR) ; Low power modulators ; Sigma modulators ; Voice band applications ; Bandwidth ; CMOS integrated circuits ; Natural frequencies ; Phase locked loops ; Spurious signal noise ; Modulators
  8. Source: Analog Integrated Circuits and Signal Processing ; Volume 49, Issue 2 , 2006 , Pages 199-211 ; 09251030 (ISSN)
  9. URL: https://link.springer.com/article/10.1007%2Fs10470-006-9567-6