共查询到20条相似文献，搜索用时 125 毫秒
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提出了三种新的单ＣＣⅡ电流滤波器双二次结构，可以实现二阶低通、高通、带通、全通、陷波等电流模式滤波器，在所有三种结构中，ＣＣⅡ外接的无源ＲＣ元件不超过５个，由于采用ＣＣⅡ的Ｚ端以高阻抗方式输出，这些电流模式双二阶滤波节可以直接相互级联起来构成高阶滤波电路，而不需另加ＣＣⅡ隔离级，电路结构简单，无源和有源元件灵敏度均较低。 相似文献
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文章设计了一种基于CMOS第二代电流控制传输器(CCCIIs)实现的电调谐电流模式多功能滤波器。该滤波器电路仅由四个CCCIIs和两个接地电容组成。通过选择合适的输入和输出端,就能实现低通、高通、带通、带阻和全通五种滤波。此外,不需元件匹配条件,只需改变CCCIIs的直流偏置电流Ib,就可以独立调节滤波器的固有频率wo和品质因数Q,且具有较低的有源和无源灵敏度。采用TSMC0.18um CMOS工艺参数,进行Hspice仿真证实了所设计的电路是正确的。 相似文献
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提出了一种具有独立输出端口的电流传送器二阶电流模滤波器的新电路，并由此得到了高通、带通和低通滤波特性．该电路具有敏感度较低和ＲＣ元件数较少的特点 相似文献
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提出了用改进式电流传送器实现二阶电流模式状态变量滤波器新电路，并由此得到了高通、带通、低通滤波特性。计算机仿真结果表明理论分析是正确的，所提电路具有灵敏度甚低的特点。 相似文献
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提出了采用单四端浮点零器实现电流模式二阶全通／陷波和一阶全通滤波器新电路,该电路具有高输出阻抗和氏无源灵敏度特点。 相似文献
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利用Ｋ．Ｐａｌ提出的改进式ＣＣⅡ系统地生成了电流模式ＣＣⅡ基本积木块电路．在此基础上,提出了电流模式三阶低通、高通跳耦滤波器的设计办法．计算机仿真结果表明设计电路完全正确．此法简单,可推广到更高阶的电流模式低通、高通有源滤波器的设计 相似文献
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提出了一种新的多级电流模式双二阶滤波器通用结构，可获得电流模式二阶高通、低通、带通、全通和陷波滤波功能。该结构中的核心电路可集成在一起，仅需外接几只可调电阻便可以实现Ｑ、ω０和Ｇ的独立调节，这种滤波结构具有较高的输出阻抗和电流滤波增益，元件灵敏度较低。文章还给出了这种结构的简化模型和设计示例。 相似文献
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本文在第二代电流传输器的基础上提出了多端输出第二代电流传输器（Moccll）的实现电路．并用cadance仿真电路,证明了所提出的电路的正确性。用该模块组成的电流模式滤波器,能同时实现低通、带通和高通。 相似文献
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V. G. Justin S.D Tarey T. Venkatesh 《Indian journal of clinical biochemistry : IJCB》1999,14(2):249-251
Routine investigations of a 70 year old male led to provisional diagnosis of anemia. However further investigations suggested
the possibilities of carcinoma of stomach associated with pernicious anemia, multiple myeloma and megaloblastic anemia. Finally
serum protein electrophoresis supported by the clinical suspicion confirmed multiple myeloma. 相似文献
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Abdul-Majid Wazwaz 《Journal of The Franklin Institute》2010,347(3):618-10294
The Burgers’ hierarchy is investigated. Hirota's bilinear method is employed for a reliable treatment of this hierarchy. Multiple kink solutions and multiple singular kink solutions are formally derived for Burgers’ hierarchy. 相似文献
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Radhakrishnan Suresh Kumar Sajid Syed Anandakuttan Anand Kumar K. N. Subha Kumari K. Sajitha 《Indian journal of clinical biochemistry : IJCB》2013,28(3):255-258
Low serum vitamin D level has an increased association with risk of multiple sclerosis (MS).There has been no published data on the levels of this vitamin in Indian population with MS. Hence we decided to undertake this study to document if there is evidence of vitamin D deficiency in patients with MS in our population. 26 patients with diagnosis of MS by modified Mc Donald’s criteria were enrolled in this study. Serum vitamin D (1,25 hydroxy) levels were measured by electro-chemiluminescence in our biochemistry lab. An age-matched control group of 202 patients who did not have a diagnosis of MS were included. In our study group 76.9 % had vitamin D level less than 20 ng/ml compared to 65.5 % of control group (p value of 0.019). Our study revealed a trend towards low vitamin D values in Indian MS patients. 相似文献
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随着GNSS及计算机技术的不断发展,人们对室内外位置服务的需求不断增加。学校、医院、展厅、写字楼等都需要使用准确的室内外定位信息,特别是在应对紧急情况时,室内定位信息显得尤为重要。本文分析了多传感器融合的室内外定位技术研究进展,提出了基于数据融合的多传感器融合定位平台,以GPS技术为主导,结合WIFI、航位推算等定位技术的方法,通过一定的数据融合算法,增强室内外定位的完备性,为进一步实现室内外无缝定位、智慧地球等提供了参考。 相似文献
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Sutirtha Chakraborty Susruta Sen Debkishore Gupta Sidhartha Sankar Ghosh Prasad Sawant Mandrita Das 《Indian journal of clinical biochemistry : IJCB》2014,29(2):250-252
A 50 year old male was admitted in our hospital with anemia and impaired renal function. He was subsequently found to have extremely elevated serum phosphate level (24 mg/dL, reference interval: 2.5–4.5 mg/dL) with normal serum calcium when assayed on a Beckman Coulter AU 480® analyser. Clinico-biochemical discrepancy led to the suspicion of spurious hyperphosphatemia. Serum total protein was grossly elevated with gross reversal of albumin to globulin ratio. Serum electrophoresis revealed a large M band and was confirmed as Ig G-Kappa type on immunofixation. Subsequently a bone marrow aspiration biopsy confirmed the diagnosis of multiple myeloma. The patient serum was then reassayed for phosphate on a Vitros® 250 Dry Chemistry platform and the result was within normal reference interval. Paraproteinemias are a common cause of analytical interference in clinical biochemistry laboratories and as multilayered film technology platforms like Vitros® assay most routine analytes on a protein free filtrate they are unaffected by paraprotein interference. Clinically discordant patient results should always be interpreted keeping such interferences in mind. 相似文献