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

被引：0
|
作者：
Safarian, Aminghasem [1 ]
Sahandiesfanjani, Farzad
Heydari, Payam
Atarodi, S. Mojtaba
机构：
[1] Univ Calif Irvine, Irvine, CA 92697 USA
[2] Tripath Technol Inc, San Jose, CA USA
[3] Sharif Univ Technol, Tehran, Iran
来源：
ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING | 2006年 / 49卷 / 02期
关键词：
low power; delta/sigma modulator; class-AB op-amp; voice band application;
D O I：
10.1007/s10470-006-9567-6
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
The design of a power-efficient second-order Delta/Sigma 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 0.25 mu m standard CMOS process, and exhibits 86 dB dynamic range (DR) for a 4 kHz voice-bandwidth. The proposed modulator consumes 125 mu W from a 2.5 V supply.
引用
下载
收藏
页码：199 / 211
页数：13
相关论文
共 44 条
  • [41] A low-power CT 2nd order Delta Sigma modulator using a new design methodology for biomedical applications
    Hemmati, Firoz
    Aghdam, Esmaeil Najafi
    AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, 2021, 137
  • [42] A Low-Power W-Band SiGe-HBT Double-Balanced Up-Conversion Mixer With an Integrated Second-Order IF Low-Pass Filter
    Vardarli, Eren
    Chen, Austin Ying-Kuang
    Schroeter, Michael
    IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS, 2024, 34 (05): : 544 - 547
  • [43] An Ultra-Low Power Wide-Band Single-Transistor Second-Order Allpass Filter in 65nm CMOS
    Elamien, M. B.
    Maundy, B. J.
    Belostotski, L.
    Elwakil, A. S.
    2019 IEEE 62ND INTERNATIONAL MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS (MWSCAS), 2019, : 373 - 376
  • [44] A 1.1V very low-power ΣΔ modulator for 14-b 16KHz A/D conversion using a novel class AB transconductance amplifier.
    Galan, J
    VegaLeal, AP
    Muñoz, F
    Carvajal, RG
    Torralba, A
    Tombs, J
    Ramirez-Angulo, J
    2002 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOL II, PROCEEDINGS, 2002, : 616 - 619
12345