| 基于衬底驱动技术的0.8 V三阶椭圆 OTA-C滤波器 |
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| 引用本文： | 张海军,杨银堂,张宝君.基于衬底驱动技术的0.8 V三阶椭圆 OTA-C滤波器[J].微电子学,2006,36(2):253-256. |
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| 作者姓名： | 张海军 杨银堂 张宝君 |
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| 作者单位： | 西安电子科技大学,微电子研究所,宽禁带半导体材料与器件教育部重点实验室,陕西,西安,710071 |
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| 基金项目： | 中国科学院资助项目;国家预研基金 |
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| 摘 要： | 基于衬底驱动MOS技术,设计了一种0.8 V高性能全差分CMOS跨导运算放大器(OTA)。在互补输入差分对的衬底端施加信号,避开MOSFET阈值电压的限制,以达到超低压应用。在0.8 V的电源电压下,其直流开环增益为73.8 dB,单位增益带宽为16.4 MHz。基于该OTA,采用无源网络模拟法,设计实现了截止频率为5 MHz,通带波纹为0.5 dB的三阶椭圆OTA-C滤波器。仿真结果表明了所设计滤波器的正确性。
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| 关 键 词： | 衬底驱动 超低压 CMOS 三阶椭圆OTA-C滤波器 |
| 文章编号： | 1004-3365（2006）02-0253-04 |
| 收稿时间： | 2005-08-22 |
| 修稿时间： | 2005-08-222005-11-01 |
A 0. 8 V 3rd-Order Elliptic OTA-C Filter Based on Bulk-Driven Technique |
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| ZHANG Hai-jun,YANG Yin-tang,ZHANG Bao-jun.A 0. 8 V 3rd-Order Elliptic OTA-C Filter Based on Bulk-Driven Technique[J].Microelectronics,2006,36(2):253-256. |
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| Authors: | ZHANG Hai-jun YANG Yin-tang ZHANG Bao-jun |
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| Abstract: | An ultra-low voltage high performance fully differential CMOS operational transconductance amplifier(OTA) is designed based on bulk-driven MOS technique.It is applicable in ultra-low voltage by applying signals to the bulk terminals of the complementary input differential pairs,so as to avoid the constraint of threshold voltage of MOSFET.Under a 0.8 V power supply,the dc open loop gain of the OTA is 73.8 dB,and its unity gain bandwidth is 16.4 MHz.Using the proposed OTA and the passive RLC ladder method,a 3rd-order elliptic OTA-C filter with 5 MHz cutoff frequency and 0.5 dB ripple in pass-band is designed.Simulation results validate the proposed OTA-C filter. |
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| Keywords: | Bulk-Driven Ultra-Low voltage CMOS Third-Order elliptic OTA-C filter |
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