نتایج جستجو برای: single pole single throw switch spst

تعداد نتایج: 945024  

2007
W. B. Wei Q. Z. Liu Y. Z. Yin H. J. Zhou

A new reconfigurable microstrip patch antenna allowing switching between two circular polarizations is proposed. It consists of a square radiating patch and a 3 dB hybrid coupler. Using only a single-polar-double-throw (SPDT) switch, the polarization switching can be achieved. This design of the dc-bias network is extremely simple. From experimental results, the proposed antenna avoids the freq...

Mahmood Seifouri Mostafa Kohestani Parviz Amiri

In this paper, we investigate the parameters affecting Total Harmonic Distortion (THD) and Power Supply Rejection Ratio (PSRR) in PWM Class D Amplifiers (CDAs) on the basis of linear models with feedback. From our mathematical analysis, we show that the THD of a PWM Class D amplifier with feedback can be improved by increasing the gain of the integrator through adding another amplifier at the o...

2011
Markus Stefer Mark Petermann Martin Schneider Dirk Wübben Karl-Dirk Kammeyer

In this paper, a hardware-based calibration scheme at the base station is used to mitigate the impact of the non-reciprocal transceivers in a time division duplex (TDD) multiple-input-multiple-output orthogonal-frequency-division-multiplexing (MIMOOFDM) system. The calibration setup consists of two single-pole-double-throw (SPDT) switches to bypass the calibration and the data signals. Addition...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تهران - دانشکده علوم 1381

تاکسونهایی از گروه گو نهای خاردار در ایران جهت بررسی برخی الگوها تکاملی از لحاظ ریخت شناسی و کاریوتیپ مورد مطالعه قرار گرفتند. در این بررسی ریخت شناسی 35 صفت برای ‏‎otu‎‏ 12 مورد نظر مطالعه و ماتریس اطلاعات حاصل از طریق روشهای آنالیز فاکتور و خوشه بندی های ‏‎single linkage , upgma, ward‎‏ مورد تجزیه و تحلیل قرار گرفتند نتایج ‏‎ward , upgma‎‏ یکسان بود. همچنین نتایج ‏‎single linkage‎‏ با روش آنا...

2015
Osamu Itano Naruhiko Ikoma Hidehiro Takei Go Oshima Yuko Kitagawa

BACKGROUND Minimizing blood loss is an important aspect of laparoscopic liver resection. Liver transection is the most challenging part of liver resection, but no standard method is available for this step at present. Herein, we have introduced the superficial precoagulation, sealing, and transection (SPST) method, a potentially "bloodless" and "ecofriendly" laparoscopic liver transection techn...

Journal: :Journal of the Magnetics Society of Japan 1996

Journal: :Journal of the Magnetics Society of Japan 1989

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