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71.
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Geun?Rae?Cho Tom?ChenEmail author 《Analog Integrated Circuits and Signal Processing》2005,44(3):219-229
A very low voltage transconductor for video frequency range applications and compatible with standard CMOS technology is described.
In the proposed transconductor, except the DC level shifter circuit (DCLS), the whole transconductor uses the main supply
voltage [which can be as low as 1.5 V in a standard 0.6 μm CMOS technology] while the DCLS uses a simple charge-pump circuit
as its supply voltage and has a very low current consumption. In addition, proper common-mode sense and charge-pump circuits
are developed for this low-voltage application. Meanwhile, some techniques to improve the frequency response, linearity, and
noise performance of the proposed transconductor are described.
In a standard 0.6 μm CMOS technology and single 1.5 V supply, simulations show that the proposed transconductor futures a
THD of −50 dB for 1.4 Vpp and 10 MHz input signal and −60 dB for 1.4 Vpp and 1 MHz signal where the threshold voltage of MOS transistors could be as high as 1 V. Based on the proposed transconductor,
a lowpass filter with 700 kHz to 8 MHz programmable cutoff frequency and a bandpass 10.7 MHz second order filter were implemented.
Armin Tajalli received the B.Sc. from Sharif University of Technology (SUT), Tehran, Iran, in 1997, and M.Sc. from Tehran Polytechnic University,
Tehran, Iran, in 1999.
From 1998 he has joint Emad Co. as a senior design engineer were he has worked on several industrial and R&D projects on analog
and mixed-mode ICs. He received the award of the Best Design Engineer from Emad Co., 2001, the Kharazmi Award of Industrial
Research and Development, Iran, 2002, and Presidential Award of the Best Iranian Researchers, in 2003. He is now working toward
his PhD degree at SUT. His current interests are design of high speed circuits for telecommunication systems.
Mojtaba Atarodi received the B.S.E.E. from Amir Kabir University of Technology (Tehran Polytechnic) in 1985, and M.Sc. degree in electrical
engineering from the University of California, Irvine, in 1987. He received the Ph.D. degree from the University of Southern
California (USC) on the subject of analog IC design in 1993.
From 1993 to 1996 he worked with Linear Technology Corporation as a senior analog design engineer. Since then, he has been
consulting with different IC companies. He is currently a visiting professor at Sharif University of Technology. He has published
more than 30 technical papers in the area of analog and mixed-signal integrated circuit design as well as analog CAD tools. 相似文献
73.
介绍了几种典型的基于超导储能(SMES)的超导电力组合装置,包括SMES-SPS(串联移相器),SMES-STATCOM(静止无功补偿器),SMES-UPFC(统一潮流控制器)以及SMES-SFCL(超导故障限流器).讨论了一种新型SMES-SFCL的多功能组合装置.该装置在限制一个系统短路电流的同时,可以对另一个独立系统进行电压调节.给出了该装置的拓扑结构和仿真结果,并对该装置的实际应用问题进行了讨论. 相似文献
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本文介绍了基于ADuC841的水泥回转窑旋风预热器控制系统的设计.该系统通过在旋风筒中安装各种传感器实时监控筒内的风量、风速、温度等状态,同时应用可控硅技术对旋风预热器中风机进行控制,得到所需要的理想风量,使得能更充分的利用水泥回转窑的尾气热能,同时也能减少水泥回转窑污染废气排放,利于环保要求.上位机采用图形化编程语言LabVIEW实现,界面友好,用户使用方便.模拟实验与现场运行验证了设计的有效性. 相似文献
77.
微波功率测量中消除失配误差的方法 总被引:3,自引:0,他引:3
陈彬 《国外电子测量技术》2008,27(10)
失配误差是微波功率测量中误差产生的重要原因之一。文中提出用一个90°移相器(即1/4波长传输线)消除这一误差的方法,先进行了理论分析,再用实验验证了此方法能使微波功率的测量误差大大下降,并且此方法还可作为信号源与功率计的功率传感器之间失配指标的鉴定方法,很有实用价值。 相似文献
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