Current Issue : July - September Volume : 2016 Issue Number : 3 Articles : 5 Articles
In this paper, a novel voltage controlled oscillator (VCO) with low phase noise, low power consumption\nand wide tuning range in the industrial, scientific and medical (ISM) band is proposed\nfor communication systems applications. For improving the phase noise, filtering technique is\nused and VCO is designed with TSMC CMOS 0.18 Ã?¼m technology and the power supply is 1.5 V. The\nsimulation results with advanced design system (ADS) shows that phase noise in 1 MHz offset frequency\nfrom the carrier is âË?â??122 dBc/Hz and tuning range is 2 to 2.8 GHz. The power consumption\nof the core is 2.49 mW....
We have demonstrated a method for using proper models of pentacene P-channel and fullerene N-channel thin-film transistors\n(TFTs) in order to design and simulate organic integrated circuits. Initially, the transistors were fabricated, and we measured their\nmain physical and electrical parameters. Then, these organic TFTs (OTFTs) were modeled with support of an organic process\ndesign kit (OPDK) added in Cadence.The key specifications of the modeled elements were extracted frommeasured data, whereas\nthe fitting ones were elected to replicate experimental curves. The simulating process proves that frequency responses of the\nTFTs cover all biosignal frequency ranges; hence, it is reasonable to deploy the elements to design integrated circuits used in\nbiomedical applications. Complying with complementary rules, the organic circuits work properly, including logic gates, flipflops,\ncomparators, and analog-to-digital converters (ADCs) as well.The proposed successive-approximation-register (SAR) ADC\nconsumes a power of 883.7 ...
A wide-band microstrip bandpass filter (BPF) based on the improved composite right/left-handed transmission line (CRLH-TL)\nstructure is presented in this paper.Compared to the traditional CRLH-TL with via hole, the improved one is an all-planar structure,\nwhich owns the advantage of fabrication and loss. The equivalent lossless LC circuit model of the proposed structure is established.\nEM software Sonnet is adopted to design the wide-band filter with bandwidth of 1.4GHz (from 1.9GHz to 3.3GHz). The circuit\noccupies only 20.6 Ã?â?? 12.8mm2. Finally, the fabrication and measurement are implemented. A good agreement between simulation\nand measured results verifies the validity of the design methodology....
A reconfigurable low-noise amplifier (LNA) with digitally controllable gain and power consumption is presented. This architecture\nallows increasing power consumption only when required, that is, to improve LNA�s radiofrequency performance at extreme\ncommunication-channel conditions and/or to counteract the effect of process, voltage, and temperature variations.The proposed\ndesign leads to significant power saving when a relaxed operation is acceptable. The LNA is implemented in a 130 nm 1.2V CMOS\ntechnology for a 2.4GHz IEEE-802.15.4 application. Simulated LNA peformance (taking into account the worst cases under process\nvariations) is comparable to recently published works...
We demonstrate the production of organic bottom gate transistors with self-aligned\nelectrodes, using only continuous roll-to-roll (R2R) techniques. The self-alignment allows accurate\n<5 Ã?¼m layer-to-layer registration, which is usually a challenge in high-speed R2R environments as the\nstandard registration methods are limited to the millimeter rangeââ?¬â?or, at best, to tens of Ã?¼m if online\ncameras and automatic web control are utilized. The improved registration enables minimizing the\noverlap between the source/drain electrodes and the gate electrode, which is essential for minimizing\nthe parasitic capacitance. The complete process is a combination of several techniques, including\nevaporation, reverse gravure, flexography, lift-off, UV exposure and development methodsââ?¬â?all\ntransferred to a continuous R2R pilot line. Altogether, approximately 80 meters of devices consisting\nof thousands of transistors were manufactured in a roll-to-roll fashion. Finally, a cost analysis is\npresented in order to ascertain the main costs and to predict whether the process would be feasible\nfor the industrial production of organic transistors....
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