| 一种采用共栅频率补偿的轨到轨输入/输出放大器 |
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| 引用本文： | 王为之,靳东明. 一种采用共栅频率补偿的轨到轨输入/输出放大器[J]. 半导体学报, 2006, 27(11): 2025-2028 |
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| 作者姓名： | 王为之 靳东明 |
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| 作者单位： | 清华大学微电子学研究所，北京 100084;清华大学微电子学研究所，北京 100084 |
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| 摘 要： | 提出了一种采用共栅频率补偿的轨到轨输入/输出放大器,与传统的Miller补偿相比,该放大器不仅可以消除相平面右边的低频零点,减少频率补偿所需要的电容,还可获得较高的单位增益带宽.所提出的放大器通过CSMC 0.6μm CMOS数模混合工艺进行了仿真设计和流片测试:当供电电压为5V,偏置电流为20μA,负载电容为10pF时,其功耗为1.34mW,单位增益带宽为25MHz;当该放大器作为缓冲器,供电电压为3V,负载电容为150pF,输入2.66 Vpp10kHz正弦信号时,总谐波失真THD为-51.6dB.
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| 关 键 词： | 轨到轨 缓冲级 放大器 CMOS 共栅 频率补偿 轨到轨 输入 输出 放大器 Input Compensation Frequency Amplifier 总谐波失真 正弦信号 缓冲器 功耗 负载电容 偏置电流 供电电压 流片测试 仿真设计 混合工艺 |
| 文章编号： | 0253-4177(2006)11-2025-04 |
| 收稿时间： | 2006-03-15 |
| 修稿时间： | 2006-07-14 |
A Rail-to-Rail Input/Output Amplifier Using Common-GateFrequency Compensation |
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| Wang Weizhi and Jin Dongming. A Rail-to-Rail Input/Output Amplifier Using Common-GateFrequency Compensation[J]. Chinese Journal of Semiconductors, 2006, 27(11): 2025-2028 |
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| Authors: | Wang Weizhi and Jin Dongming |
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| Affiliation: | Institute of Microelectronics,Tsinghua University,Beijing 100084,China;Institute of Microelectronics,Tsinghua University,Beijing 100084,China |
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| Abstract: | A rail-to-rail input/output CMOS amplifier using common-gate compensation is proposed. The amplifier achieves a unity gain frequency of 25MHz while employing only one compensation capacitor. The power dissipation of the circuit is 1.34mW with a supply voltage of 5V and a biasing current of 20tzA. Using the proposed circuit,a unity gain buffer is also implemented with a supply voltage of 3V and driving a capacitive load of 150pF. A THD of - 51.6dB is obtained for a 2.66Vpp 10kHz input sine signal. Simulated results reveal a high slew-rate and large driving capability. This amplifier is fabricated in CSMC 0.6tzm CMOS mixed-signal technology. The test results are also provided. |
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| Keywords: | rail-to-rail buffer amplifier CMOS |
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