Browsing Master's Theses by Author "Tekin, Ahmet"
Now showing items 1-20 of 20
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A 1GS/S, 9-BIT DAC I interleaved (2+1)-bit then 2-bit per cycle, reference free SAR ADC
El-Sawy, Salma H. (2019-01-02)This work presents a high speed, medium resolution Successive Approximation Register Analog to Digital Converter (SAR ADC) designed for low-noise, low- power satellite transceiver applications. The proposed system is a ... -
A4WP-QI combo system for continious wireless charging range coverage with resonance filtering
Sağlam, Üstün (2019-01-02)Distribution of wireless power charging field uniformly on a large area pad is critical for receivers, especially for wearable devices because of their small form factor receiver coil. Since the receiver coil size is quite ... -
Advisor: an adaptive framework for test oracle automation of visual output systems
Genç, Ahmet Esat (2019-01-10)Test oracles differentiate between the correct and incorrect system behavior. Automation of test oracles for visual output systems mainly involves image comparison, where a snapshot of the observed output during test is ... -
Design and quantitative analysis of a pulse wave velocity blood-pressure measurement subsystem with multiple-subject controlled experiments
Erkurşun, Burcu (2018-08)The main purpose of this study is to perform the pulse wave velocity (PWV) measurements with a new noninvasive optoelectronic continuous-time wearable sensor design and analyze the quantitative relation between the reference ... -
Design of high gain wideband quad-ridged horn antenna for emc testing
Solak, Bekir (2017-06)This thesis presents a design and simulation of high gain wideband quad-ridged circular horn antenna for Electromagnetic Compatibility (EMC) testing. The selected operating frequency range of the antenna is from 1 GHz to ... -
Dopamine detection using mercaptopropionic acid and cysteamine for electrodes surface modification
Khan, Muhammad Salman (2017-05)This research work emphasizes on main objective of dopamine detection using electrochemical detection analysis. Dopamine is an electrochemical neurotransmittor and is an essential part in human body for many decisions. It ... -
Effect of colour conversion layer on the optical and thermal efficiency of LED based liquid crystal displays
Bakan, Emrah (2018.05)In light-emitting diode (LED) lit liquid crystal displays (LCD), the colour gamut is related to the back-light unit (BLU) spectrum. The blue LED light is generally converted to green and red bands with phosphor mixtures. ... -
Energy consumption modeling and optimization of speed profile for plug-in electric vechiles
Tasooji, Tohid Kargar (2018-05)In recent years, there is a surge in research on Plug-in Electric Vehicles (PEVs), as PEVs are one of the ways that we can reduce carbon emissions. Dramatic cost reduction in PEVs has resulted in their becoming mainstream ... -
FOVLC: Foveation based data hiding in display transmitters for visible light communications
Yıldız, Özgür (2018-05)Visible light communications is an emerging architecture with unlicensed and huge bandwidth resources, security, and experimental implementations and standardization e orts. Display based transmitter and camera based ... -
FPGA implementation of a dense optical flow algorithm using altera OpenCL SDK
Ulutaş, Umut (2017-08)FPGA acceleration of compute-intensive algorithms is usually not regarded feasible because of the long Verilog or VHDL RTL design efforts they require. Data-parallel algorithms have an alternative platform for acceleration, ... -
High frequency power supply design
Zengin, Özlem Özden (2019-08-20)Portability, power density, and energy e ciency are among the hottest topics of today. Therefore, the need for higher power-capacity, smaller size, and higher e ciency power supply is increasing day by day. At this point, ... -
An improved speed controller for PMSM drive with unbalanced load using load torque observer
Yoldaş, Koray (2019-05-22)In order to overcome disturbance effects as load torque variations in Permanent Magnet Synchronous Motor (PMSM), an improved controller with feed forward compensation is presented in this study. Washing machines which are ... -
Investigation on the effects of dc-link capacitors to DC/AC converter under various operation conditions
Bilgin, Mert Serdar (2019-05-29)In the designing stage of a DC/AC converter, determining parameters of components has an essential role such as value, size and material type. DC-Link capacitors are the critical components for DC/AC converters and define ... -
Lighting design considerations and channel modeling for visible light communications
Safaraliev, Sadi (2019-06-10)There has been an extensive work on visible light communication (VLC) mainly due to scarcity in radio frequency (RF) spectrum and urgent need for a new wireless communication system in the near future. VLC considers the ... -
Modeling of RF energy harvesting and energy consumption system for low power wireless sensor networks
Amjad, Osama (2017-01)Recently, with the advancement of technology, there has been a rapid growth of low power wireless devices, such as wireless sensor networks (WSNs) and Internet of Things (IoT). Therefore, the energy requirement for perpetual ... -
A new LED driver design with CRM flyback topology and high power factor and low total harmonic distortion
Kavcı, Mustafa (2018-01)In many of today's solid-state lighting (SSL) applications, Critical Conduction Mode (CRM) Flyback PFC converter is a popular solution due to its limited component count and simple structure with respect to other switched ... -
Optimization and analysis of WLAN RF energy harvesting system architecture for low power wireless applications
Munır, Syeda Wajıha (2017-01)The presented work proposes a radio frequency (RF) energy harvesting circuit design, which scavenges energy from WLAN dual frequency band. In comparison to other available sources for energy scavenging, e.g. solar, wind ... -
Patterned polymer films using soft lithography and micro molding in capillaries (MIMIC)
Asıf, Afia (2017-05)This research work reports a low cost method to pattern large area surfaces using soft-lithographic approach through several polymers, particularly with the self-assembly of block co-polymers (BCPs) and also by fabricating ... -
A robust voltage control method for universal ev battery charge llc resonant converters
In this study, a novel control method for LLC resonant converter with wide output voltage range and constant switching frequency is proposed targeting wide range of Electric Vehicle (EV) battery charger standards. In ... -
A sub-sampling pulse-resonance OOK modulated digital ultrasound communication system for medical IOT
Abouzeid, Mohamed Osama Hussein Soliman (2018-04)This dissertation presents a new ultrasound communication microsystem (Pulsed Resonance On-Off Keying) as a viable alternative to today's widely used RF technologies in order to avoid the associated health risks. Special ...
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