Pusat Pengajian Kejuruteraaan Elektrik dan Elektronik - Tesis

Browse

Recent Submissions

Now showing 1 - 5 of 500
  • Thumbnail Image
    Publication
    Identification Of Muscle Sound (MMG) In Human Body
    (1999-04)
    Khedher A. Hmood
    From the biomedical engineering study on muscle fibers, there are two types of signals: Electromyography (EMG) signal and muscle sound (MMG). The EMG signal is generated by the human muscle and is detected by using stainless steel electrodes but the muscle sound MMG is detected using vibration detection sensor such as piezoelectric sensor. In this thesis, a suitable sensor has been used to detect the muscle sound in order to analyze its characteristics.
  • Thumbnail Image
    Publication
    136-941 Mhz Lna Design For Software Defined Radio
    (2014-11)
    Osman, Anwar Faizd
    This research thesis describes the detailed methodology on the design of the 136- 941 mhz wideband low noise amplifier (lna) for software defined radio (sdr) base station in two-way radio applications. The operating frequencies of the design are based on the full spectrum (wideband requirement) of the tia-603c standard for land mobile fm communication equipment. The lna design process includes a comprehensive circuit analysis, design methodology and performance comparisons of the two wideband topologies selected for this research, the negative feedback technique and balanced amplifier topology. This research thesis also illustrates the simultaneous amplifier requirements in wideband application and proposed a structured practical design approach which utilizes the cad simulations in optimizing the amplifiers to meet all the required specs, to balance the design tradeoff and the drawing of the pcb layouts. The design process also includes the method of achieving accurate correlation between the simulation and the actual design. The final stage of the research process was the fabrication of the two topologies using rogers r04003c pcb board and the practical testing measurement of the design using rf equipment to verify the performance of the designed lna.
  • Thumbnail Image
    Publication
    Attitude Determination System For Nano Satellite Using Extended Kalman Filter On Arm7tdmi Platform
    (2014-09)
    Keui, Adam Ain Mohd Poin
    Extended kalman filter (ekf) has been successfully utilized in satellites missions. However, in comparison to other attitude determination methods developed, it is one of the most computationally burdening algorithm and with the new development of using nano satellites which have limited electrical power, mass, space and usually budget, it is essential to design an attitude determination system (ads) which conforms to this limitation. Therefore, in this thesis, as a computational improvement on the innosat project, the rcm3400 microcontroller of the ads is replaced with the arm7tdmi based microprocessor to test its capability. The arm7tdmi has been chosen since it is one of the well-known microprocessor used in various electronic equipment because it is low power and robust. The embest s3cev40 development board used, houses the s3c44b0x microprocessor which is an arm7tdmi microprocessor. The testing is done by connecting the development board to a personal computer which has been installed with the arm interface software based on visual basic 6.0.
  • Thumbnail Image
    Publication
    Transistor Level Implementation Of Led Driver For Solid State Lighting
    (2014-07)
    Abdul Aziz, Siti Rohaya
    This thesis presents the transistor level implementation of led driver for solid state lighting (ssl). Ssl refers to a type of lighting that uses semiconductor light emitting diodes, organic light emitting diodes (oled), or polymer light emitting diodes (pled) as sources of illumination. Led driver is an electrical device that provides required led voltage and regulates the constant amount of power to the needs of led or string of led. A buck converter is one type of dc- dc converter that can step down the dc input voltage to the required led voltage. In the high input voltage application of the rectified 220-240v ac, the modified buck converter technique has been applied instead standard buck that requires complicated design of bootsrap mode. The development of discrete led driver prototype is to prove the buck converter operation. This circuit design has been integrated with the led driver integrated circuit (ic) to provide a constant current output to the leds with the intention to decrease the size, weight and cost. The design of led driver ic is started with the behavioral modeling technique for proposed control circuit with integrated power switch, dmos. The obtained parameters from behavioral model have been implemented in the transistor level design using x-fab xdm10 1.0pm 350v process technology. In this project, leds string will be driven as much as 20 with the total forward voltage are 50-60v and the current is 350ma.
  • Thumbnail Image
    Publication
    Power Management System For Water Quality Monitoring System In Aquaculture Application
    (2014-09)
    Malik, Azman Ab
    This project proposes a Power Management System (PMS) for water quality monitoring systems in aquaculture applications. The proposed system requires power supply 12V, 200mAh with five sensors, which are ammonium sensor, temperature sensor, water level sensor, dissolve oxygen sensor and pH sensor. The proposed system use lithium ion battery due to its smaller size, lighter, longer life span and stable output voltage. Nowadays lithium ion battery charger is only available for batteries that are arranged in parallel. Hence it is suitable only for 3 V application. However for 12 V system, the voltage have to step up from 3 V to 12V, and it will cause power losses during the step up process. Therefore a charger in series configuration is studied in this project. Four models are developed and studied which are; 1) batteries are arranged in parallel and solar energy is used to charge the battery. 2) batteries are arranged in series and solar energy is used to charged the battery, 3) solar power and batteries that are arranged in parallel are used to supply power for the system, 4) solar power and batteries that are arranged in series are used to supply power for the system. carried out by using the same load. Results show that the second model improves by 173% of discharging rate compared to model 1. Compared with the model 1 and model 2, the model 3 improves by 193% and 7% respectively for the total discharging rate. For the model 4, the discharging rate is better 406%, 85% and 73% compared to model 1, model 2 and model 3 respectively. Results also shows that by using LM2577 as a charger in model 2 and model 4 it xviii Experiments to get charging rate and discharging rate to supply power for the system are