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An enhanced dynamic range low-power delta-sigma modulator for portable voice band applications

Safarian, A. Q ; Sharif University of Technology | 2003

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  1. Type of Document: Article
  2. DOI: 10.1109/SSMSD.2003.1190439
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2003
  4. Abstract:
  5. A new second order sigma delta modulator with the reduced number of op-amps, to decrease static power consumption and area, is presented for voice band applications such as codecs. This switched capacitor modulator uses reused capacitor technique to reduce the input thermal noise and circuit area. It improves the DR of modulator by almost 0.5 bit. The modulator shows 87 dB DR for voice band while consuming 125 μW from a 2.5 V supply. © 2003 IEEE
  6. Keywords:
  7. Codecs ; Delta modulation ; Delta-sigma modulation ; Dynamic range ; Energy consumption ; Modulation coding ; Noise reduction ; Operational amplifiers ; Switched capacitor circuits ; Switching circuits
  8. Source: 2003 Southwest Symposium on Mixed-Signal Design, SSMSD 2003, 23 February 2003 through 25 February 2003 ; 2003 , Pages 263-268 ; 0780377788 (ISBN); 9780780377783 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/1190439