A CBSC Second-Order Sigma-Delta Modulator in 3μm LTPS-TFT Technology

被引：9
|
作者：
Lin, Wei-Ming [1 ]
Lin, Chan-Fei [1 ]
Liu, Shen-Iuan [1 ]
机构：
[1] Natl Taiwan Univ, Grad Inst Elect Engn, Dept Elect Engn, Taipei 10617, Taiwan
来源：
2009 IEEE ASIAN SOLID-STATE CIRCUITS CONFERENCE (A-SSCC) | 2009年
关键词：
CMOS;
D O I：
10.1109/ASSCC.2009.5357196
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 second-order sigma-delta modulator has been implemented in 3 mu m low-temperature poly-silicon thin-film transistor (LTPS-TFT) technology. Since the LTPS-TFT operational amplifier has a low open-loop gain, a large offset voltage, and the poor linearity, the proposed comparator-based switched-capacitor integrator with correlated double sampling is adopted in the modulator. The whole modulator consumes 63.3mW from an 11.2V supply and occupies 26mm(2) area. In a signal bandwidth of 1.56kHz for the touch panel application, the measured input dynamic range is 69dB and the measured peak signal-to-noise plus distortion ratio is 65.63dB with the duty-cycle control technique.
引用
收藏
页码：133 / 136
页数：4
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