نتایج جستجو برای: photo transistor

تعداد نتایج: 46866  

Journal: :مهندسی برق و الکترونیک ایران 0
m. moulavi-kakhki d. rejaly

in this work the performance of a wavelength division multiple access (wdma) system with direct detection receiver is investigated. for this purpose, the probability of error in a wdma network with ook modulation considering crosstalk, isi, photo detector noise and thermal noise is calculated and the effect of each on system performance is investigated. the system performance in presence of pin...

Journal: :Biosensors & bioelectronics 2004
Ariel Cohen Micha E Spira Shlomo Yitshaik Gustaaf Borghs Ofer Shwartzglass Joseph Shappir

We report the realization of electrical coupling between neurons and depletion type floating gate (FG) p-channel MOS transistors. The devices were realized in a shortened 0.5 microm CMOS technology. Increased boron implant dose was used to form the depletion type devices. Post-CMOS processing steps were added to expose the devices sensing area. The neurons are coupled to the polycrystalline sil...

Journal: :Nature communications 2014
Guangyu Xu Jeffrey Abbott Ling Qin Kitty Y M Yeung Yi Song Hosang Yoon Jing Kong Donhee Ham

Field-effect transistor biomolecular sensors based on low-dimensional nanomaterials boast sensitivity, label-free operation and chip-scale construction. Chemical vapour deposition graphene is especially well suited for multiplexed electronic DNA array applications, since its large two-dimensional morphology readily lends itself to top-down fabrication of transistor arrays. Nonetheless, graphene...

2008
Chun-Yu Chen Yu-Chiang Chao Hsin-Fei Meng Sheng-Fu Horng

Polymer light-emitting transistor is realized by vertically stacking a top-emitting polymer light-emitting diode on a polymer space-charge-limited transistor. The transistor modulates the current flow of the light-emitting diode by the metal-grid base voltage. The active semiconductor of the transistor is poly 3-hexylthiophene . Yellow poly para-phenylene vinylene derivative is used as the yell...

2007
Firas Mohammed Ali

High frequency models of transistors are of interest because they have applications to computeraided design of high frequency circuits. When these models are derived, a problem encountered is that measured transistor S-parameters do not agree with the hybrid-π model. In this article, a simplified method is described to obtain an optimized classical hybrid-π model that predicts the measured S-pa...

ژورنال: پژوهش در پزشکی 2007
قلمکارپور, فریبا, قورچیانی, زهرا,

Background: Photo-damaged skin is characterized not only by wrinkles and creases but also by epidermal and dermal atrophy, rough skin texture, irregular pigmentation, talengiectasis , laxity and enlarged pores. There is growing interest in the development of noninvasive methods to treat photo-damaged skin. Intense Pulsed Light (IPL), a non-coherent, broadband, pulsed light source is effective i...

Journal: :Physical Review B 2015

حسین قاسم, , محمد‌حسین مهدیه, , نورالدین محمد‌زاده, ,

  Optogalavanic technique has been used widely in laser spectroscopy. In this paper we have presented the results of an experimental three- step photo- excitation of Gd atom, using optogalvanic technique. Three tunable dye laser pulses were applied to excite the Gd atom in a three-step photo – excitation process. The optogalvanic signal was used to monitor the laser wavelength and efficiency of...

2014
Hang Chu Tsuhan Chen Dong-Qing Zhang Hether Yu

The problems of photo aesthetic and photo quality are similar, but not exactly the same. In photo aesthetic assessment, we seek photos that looks beautiful to people. The aesthetic score of a photo can be affected by the photo’s color tone, composition, layout, and etc. In photo quality assessment, we seek photos that are in high quality. The quality score of a photo can be affected by shake, b...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید