Ultra low voltage Switched Opamp ΣΔ modulator for portable applications

被引：4

作者：

Sauerbrey, J ^{[1
]}

Thewes, R ^{[1
]}

机构：

[1] Infineon Tehcnol AG, Corp Res, CPR FEC, D-81730 Munich, Germany

来源：

PROCEEDINGS OF THE IEEE 2001 CUSTOM INTEGRATED CIRCUITS CONFERENCE | 2001年

关键词：

D O I：

10.1109/CICC.2001.929719

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A Sigma Delta modulator for portable applications is presented operating within a large window of supply voltages. A third order fully differential non-cascaded modulator structure is designed in Switched-Opamp (SO) technique with common mode level shift. The circuit is realized in 0.18 mum n-well CMOS technology and occupies an area of 0.17 mm(2). Measurements are performed for supply voltages between 0.61 V and 1.5 V. Signal-to-noise ratios (SNR) of 72 dB and 64.5 dB and signal-to-noise-and-distortion ratios (SNDR) of 70 dB and 64 dB are obtained at 16 kHz signal bandwidth at supply voltages of 0.9 V and 0.75 V, respectively.

引用

页码：35 / 38

页数：4

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