Design of a gain-boosted telescopic fully differential amplifier with CMFB circuit

机译：具有CMFB电路的增益增强型伸缩式全差动放大器的设计

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Based on Chartered 0.18μ 1.8V 1P5M CMOS process, a gain-boosted telescopic fully differential amplifier with CMFB circuit is designed and used in the sampling and holding circuit of a 14-bit, pipelined A/D converter which is supplied by 1.8 V power. In order to meet specifications, gain-boosting technique is used to improve the gain of OTA and common-mode feedback circuit is elaborately designed. Two-stages CMFB have a stable transient output of 710mV and 1V, respectively. At last, simulation results showed that 106dB loop gain, 1.13GHz unity-gain bandwidth and a phase margin of 71.75 ° have been achieved for the specifications of S/H circuit. The designed circuit has been applied to the front end of a 14-bit, 100MS/s pipelined ADC.

机译：基于特许0.18μ1.8V 1P5M CMOS工艺，设计了带有CMFB电路的增益增强伸缩式全差动放大器，并将其用于由1.8 V电源供电的14位流水线A / D转换器的采样和保持电路中。为了满足规格要求，采用增益提升技术来提高OTA的增益，并精心设计了共模反馈电路。两级CMFB分别具有710mV和1V的稳定瞬态输出。最后，仿真结果表明，对于S / H电路，其环路增益为106dB，单位增益带宽为1.13GHz，相位裕度为71.75°。该设计电路已应用于14位100MS / s流水线ADC的前端。

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来源
《Consumer Electronics, Communications and Networks (CECNet), 2012 2nd International Conference on》|2012年|p.252- 255|共4页
会议地点 Three Gorges(CN)
作者
Wang Liang;
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Institute of VLSI Design Hefei University of Technology, Hefei, China;

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正文语种 eng
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Design of a gain-boosted telescopic fully differential amplifier with CMFB circuit

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