Yazar "Palamutcuogullari O." seçeneğine göre listele

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    CMOS Negative Impedance Converter Circuit with the Elimination of Parasitic Gate-Source Capacitance
    (IEEE Computer Society, 2022) Durukan S.; Palamutcuogullari O.; Yilmaz A.E.
    A CMOS negative impedance converter (NIC) circuit with the cross-coupled topology is designed to generate negative resistance/capacitance/inductance in the frequency range between 100 MHz and 3 GHz. The proposed NIC circuit can cancel the parasitic gate-source capacitances of NMOS transistors which are the core elements of this type of topology. The negative impedance conversion capability of the circuit is shown analytically. It is also verified in AWR Design Environment using BSIM3 and BiCMOS transistor models comparatively. The circuit is tested with the loads 50O resistance, 5 pF capacitance and 10 nH inductance. The results show that the performance of the proposed NIC circuit is satisfactory and close to its theoretical values. © 2022 IEEE.
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    A comparison of GaN, Si and GaAs power amplifiers [GaN, Si ve GaAs transistörlü güç kuvvetlendiricilerinin karşilaştirilmasi]
    (IEEE Computer Society, 2014) Kizilbey O.; Palamutcuogullari O.
    Power amplifiers (PAs) are used in the wide range of electronics such as RADAR, base stations, jammers and cable TV applications. These amplifiers can achieve design specifications like high efficiency and high output power (>20W) as much as the capability of the transistor. For this reason; Si LDMOSFETs, GaN HEMTs and GaAs HFETs are advancing their place in the market. In this article; GaN, Si, and GaAs power transistor technologies will be compared and an assessment will be made about which one is leading the market by 2014. © 2014 IEEE.
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    Design and implementation of a compact and long range monostatic UHF RFID reader with read point extension [Okuma noktasi artirilmiş, kompakt ve uzun menzilli monostatik UHF RFID okuyucu tasarimi ve uygulanmasi]
    (IEEE Computer Society, 2014) Bostan O.; Aydogmus H.U.; Topaloglu S.; Palamutcuogullari O.
    In this paper, a compact and long range monostatic UHF (Ultra High Frequency) RFID (Radio Frequency Identification) reader has been designed for UHF RFID applications. Another circuit, called RF multiplexer, has also been designed to reduce the system implementation cost for dense antenna applications. This device has been designed in order to increase the number of antenna output ports of reader, thus enabling extended read point capability via multiple data capture. After the design process, simulation, manufacture and measurement operations has been achieved. Reader is compatible with EPC Gen2 protocol and operates at UHF band. Moreover, the reader has an antenna tuning circuit, a novel feature, to reduce reflected RF power from antennas. This is achieved by tuning output impedance of the reader to the impedance of antenna. A power detector is used to control and limit the output power to regulatory requirements. © 2014 IEEE.