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| 一种高性能全差分运算放大器的设计 | |
| 引用本文： | 唐心亮,刘克智,王林锋. 一种高性能全差分运算放大器的设计[J]. 河北科技大学学报, 2012, 33(1): 50-55 |
| 作者姓名： | 唐心亮 刘克智 王林锋 |
| 作者单位： | 1. 河北科技大学人事处,河北石家庄 050018;河北工业大学微电子技术与材料研究所,天津300130 2. 渤海石油职业学院,河北任丘,062550 3. 河北工业大学微电子技术与材料研究所,天津,300130 |
| 摘 要： | 设计了一种具有高增益、大带宽的全差分折叠式共源共栅增益自举运算放大电路,适用于高速高精度流水线模数转换器余量增益电路(MDAC)的应用,增益自举运算放大器的主放大器和子放大器均采用折叠式共源共栅差分结构,并且主放大器采用开关电容共模反馈来稳定输出电压,该放大器工作在5.0V电源电压下,单端负载为2pF,采用华润上华(CSMC)0.5μm 5VCMOS工艺对电路进行仿真测试,结果显示该运放的直流增益可达到126.3dB,单位增益带宽为316MHz。精度为0.01%时的建立时间为4.3ns。 |
| 关 键 词： | 流水线ADC 增益自举 折叠共源共栅 采样电路 |
| 收稿时间： | 2011-09-10 |
Design of high-performance fully differential operational amplifier |
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| TANG Xin-liang,LIU Ke-zhi and WANG Lin-feng. Design of high-performance fully differential operational amplifier[J]. Journal of Hebei University of Science and Technology, 2012, 33(1): 50-55 | |
| Authors: | TANG Xin-liang LIU Ke-zhi WANG Lin-feng |
| Affiliation: | 1(1.Department of Human Resources,Hebei University of Science and Technology, Shijiazhuang Hebei 050018,China; 2.Institute of Microelectronic Technology and Materials,Hebei University of Technology,Tianjin 300130,China;3.Bohai Petroleum Vocational College,Renqiu Hebei 062550,China) |
| Abstract: | In this paper,a high gain and high fully differential gain boosted operational fold cascade amplifier is proposed.The amplifier is designed for MDAC of pipelined analog-to-digital converter.Both the main amplifier and the boosted amplifier adopt fully differential fold-cascade structure.The main amplifier uses a switched capacitance common mode feedback circuit to stabilize the output.With 5.0 V power supply,this circuit is designed in CSMC 0.5 μm CMOS process.Spectre simulation shows that the whole amplifier has the DC gain of 126.3 dB and the unity gain bandwidth of 316 MHz under 2 pF single ended load,and the settling time is 4.3 ns with an accuracy of 0.01%. |
| Keywords: | Pipelined ADC gain-boosted fold cascade sampling circuit |
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