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A new low power 2-2 cascaded Sigma-Delta modulator with the reduced number of op-amps for GSM transceiver applications

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

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  1. Type of Document: Article
  2. DOI: 10.1109/ICECS.2003.1302028
  3. Publisher: 2003
  4. Abstract:
  5. A new single-bit cascaded 2-2 σ/δ (Sigma-Delta) modulator with only two op-amps, instead of four ones in conventional modulators, to decrease the static power consumption and area, is designed for GSM transceiver applications. The circuit consists of two new single op-amp, second-order, and low-pass loop filters to achieve a fourth-order quantization noise shaping. The modulator shows 84dB DR (Dynamic Range) for GSM signal bandwidth, while consuming 2.3mW from a 2.5V supply voltage. © 2003 IEEE
  6. Keywords:
  7. Bandpass amplifiers ; Transceivers ; Operational amplifiers ; Low pass filters ; Delta sigma modulation ; Delta modulation ; Analog integrated circuits ; Transceivers ; Delta sigma modulation ; Low pass filters
  8. Source: 2003 10th IEEE International Conference on Electronics, Circuits and Systems, ICECS2003, Sharjah, 14 December 2003 through 17 December 2003 ; Volume 1 , 2003 , Pages 268-271 ; 0780381637 (ISBN); 9780780381636 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/1302028