Mohammad Dosarnian-Moghadam
[ 1 ] - Analysis and design of a CMOS current reused cascaded distributed amplifier with optimum noise performance
In this paper, analysis, simulation and design of a distributed amplifier (DA) with 0.13µm CMOS technology in the frequency range of 3-40 GHz is presented. Gain cell is a current reused circuit which is optimum in gain, noise figure, bandwidth and also power dissipation. To improve the noise performance in the frequency range of interest, a T-matching low pass filter LC network which is utilize...
[ 2 ] - اثر نسبتهای مختلف نیتروژن آمونیومی به نیتروژن کل بر رشد رویشی و گل‌دهی گیاه گلدانی بنتالقنسول
بنتالقنسول (Euphorbia pulcherrima) گیاهی گلدانی است که براکتههای رنگین آن در روزهای کوتاه تشکیل می‌شود. در این تحقیق، تأثیر نسبتهای مختلف نیتروژن آمونیومی به نیتروژن کل بر خصوصیات کمی و کیفی بنتالقنسول مطالعه شد. این آزمایش در قالب طرح بلوک کامل تصادفی با سه تکرار انجام شد. گیاهان بنتالقنسول با نسبتهای مختلف آمونیوم به نیتروژن کل صفر، پنج صدم، یک دهم و شانزده صدم میلیاکیوالان در لیتر ت...
[ 3 ] - بررسی اثر عصاره گیاهی برگ انجیر برفعالیت ماتریکس متالوپروتئینازهای (MMPs) در کشت سلول های فیبروبلاست (HEP2)
هدف از این مطالعه، بررسی اثر مهاری عصارهی برگ انجیر (Ficus Carica) بر فعالیت ماتریکس متالوپروتئینازها و در نتیجه ممانعت از تکثیر و متاستاز سلولهای توموری، در کشت سلول فیبروبلاست (HEP2) است. به این منظور، عصارهی برگ انجیر به سه شکل آبی، آبی - الکلی و الکلی تهیه شد. با استفاده از پلیتهای 24 خانهای کشت سلول حاوی ردهی سلولی فوق، به ترتیب مقادیر µl 5 عصارهی آبی (غلظت نهایی 5/0 ...
[ 4 ] - Design and Simulation of an X Band LC VCO
In this paper, a systematic method for the circuit parameters design of a monolithic LC Voltage Controlled Oscillator (VCO) is reported. The method is based on the negative resistance generation technique. As a result, a VCO has been designed in 0.18um CMOS technology using a conventional VCO structure to obtain the optimum values for the phase noise and power consumption. The simulation result...
[ 5 ] - Ultra-Widband Distributed Amplifier Using Loss Compensation Technique on Both Input and Output Circuit
In this paper, we analyze a distributed amplifier based on input/output attenuation compensation. The analysis is carried out for a HEMT transistor; and a constant-k section filter is used to calculate the amplifier’s characteristics such as attenuation factor, phase constant and gain. The proposed design approach enables us to examine the tradeoff among the variables, which include the type an...
[ 6 ] - Self-Equalized Distributed Amplifier for Wide Band Optical Transceivers
A novel technique for a self-equalized distributed amplifier is presented by showing the analogy between transversal filters and distributed amplifier topologies. The appropriate delay and gain coefficients of amplifier circuit are obtained by a Fourier expansion of the raised cosine spectrum in the frequency range of 0-40GHz.
[ 7 ] - Design, Analysis and Simulation of a Linear Phase Distributed Amplifier
In this paper a new method for the design of a linear phase distributed amplifier in 180nm CMOS technology is presented. The method is based on analogy between transversal filters and distributed amplifiers topologies. In the proposed method the linearity of the phase at frequency range of 0-50 GHz is obtained by using proper weighting factors for each gain stage in cascaded amplifier topology....
[ 8 ] - Dual-Band Evanescent-Mode Substrate Integrated Waveguide Band-pass Filter for WLAN Applications
A new multi-layer substrate integrated waveguide (SIW) structure is developed to design dual-band evanescent-mode band-pass filters (BPFs). Two independent series LC circuits are implemented by incorporating metallic irises in the different layers of the structure. The combination of the metallic irises with capacitive-plates is embedded inside the SIW to independently excite two evane...