A Continuous-Time Sigma-Delta Modulator(IEEE2004)

semico_ljj

IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 39, NO. 1, JANUARY 2004 75

A Continuous-Time Sigma-Delta Modulator With 88-dB Dynamic Range and 1.1-MHz Signal Bandwidth

Shouli Yan, Member, IEEE, and Edgar Sánchez-Sinencio, Fellow, IEEE

Abstract—This paper presents the design and experimental results
of a continuous-time Sigma-Delta  modulator for ADSL applications.
Multibit nonreturn-to-zero (NRZ) DAC pulse shaping is used to reduce
clock jitter sensitivity. The nonzero excess loop delay problem
in conventional continuous-time Sigma-Delta  modulators is solved by our
proposed architecture. A prototype third-order continuous-time
Sigma-Delta  modulator with 5-bit internal quantization was realized in
a 0.5- m double-poly triple-metal CMOS technology, with a chip
area of 2.4 2.4 mm2. Experimental results show that the modulator
achieves 88-dB dynamic range, 84-dB SNR, and 83-dB SNDR
over a 1.1-MHz signal bandwidth with an oversampling ratio of 16,
while dissipating 62 mW from a 3.3-V supply.

Index Terms—Analog-to-digital conversion, CMOS analog integrated
circuits, continuous-time Sigma-Delta modulation, multibit internal
quantization.

lxc531

goooooooooooooooood

sdfs

Thanks

blackdog

连续时间得还没看过。

zhifang

偶有这个，就不花钱了。

piao

it seems more and more people are working on CT sigma delta now.

a promising design architecture .

Thanks

nvidia

不错，正找 着呢，谢谢。

analog_zyl

文章不错,正在研究中

dingjp

xiexie !!

txy

hao dong dong