کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
547759 872038 2010 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A 0.13 μm CMOS adaptive sigma–delta modulator for triple-mode GSM/Bluetooth/UMTS applications
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر سخت افزارها و معماری
پیش نمایش صفحه اول مقاله
A 0.13 μm CMOS adaptive sigma–delta modulator for triple-mode GSM/Bluetooth/UMTS applications
چکیده انگلیسی

This paper describes the design and experimental characterization of a 0.13 μm CMOS switched-capacitor reconfigurable cascade ΣΔ modulator intended for multi-standard GSM/Bluetooth/UMTS hand-held devices. Both architectural- and circuital-level reconfiguration strategies are incorporated in the chip in order to adapt the effective resolution and the output rate to different standard specifications with optimized power dissipation. This is achieved by properly combining different reconfiguration modes that include the variation in the order of the loop filter (3rd- or 4th-order), the clock frequency (40 or 80 MHz), the internal quantization (1 or 2 bits), and the bias currents of the amplifiers. The selection of the modulator topology and the design of its building blocks are based on a top-down CAD methodology that combines simulation and statistical optimization at different levels of the modulator hierarchy. Experimental measurements show a correct operation of the prototype for the three standards, featuring dynamic ranges of 83.8/75.9/58.7 dB and peak signal-to-(noise+distortion) ratios of 78.7/71.3/53.7 dB at 400 ksps/2/8 Msps, respectively. The modulator power consumption is 23.9/24.5/44.5 mW, of which 9.7/10/24.8 mW are dissipated in the analog circuitry. The multi-mode ΣΔ prototype shows an overall performance that is competitive with the current state of the art.1

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microelectronics Journal - Volume 41, Issue 5, May 2010, Pages 277–290
نویسندگان
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