Azilah Saparon

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This paper describes a voltage controlled ring oscillator (VCO) with low-phase-noise. The VCO consists of two-stage fully differential delay cells proposed by Yan, has been analyzed and redesigned for its full switching performance using TSMC 0.18 mum CMOS technology with 2 V power supply. A fully switching differential delay cell is employed to reduce the(More)
This paper presents work on modeling & simulation of single-phase matrix converter (SPMC) as a frequency changer modulated by the sinusoidal pulse width modulation (SPWM) subjected to passive load condition. The model was implemented using MATLAB/simulink with the SimPowerSystem Block Set. Comparisons with Pspice are made. The insulated gate bipolar(More)
This paper presents improved switching strategy sequence of single-phase matrix converter (SPMC) as a direct AC-AC converter modulated by the sinusoidal pulse width modulation (SPWM). The strategy was implemented using MATLAB/Simulink with the SimPower System Block Set. Comparisons with PSPICE are made. The insulated gate bipolar transistor (IGBT) was used(More)
FSM-based and microcode-based controllers are two widely known techniques used for memory built-in self test (MBIST). FSM-based controller is commonly the hardwired BIST whilst microcode-based controller is a programmable memory BIST (P-MBIST) controller. The P-MBIST is popular because of their flexibility of programming new test algorithms. Recently, the(More)
This paper presents studies on control electronics implementation of single-phase matrix converter operating as AC-DC converter with active power filter. The control electronics uses discrete integrated circuits (ICs) for analogue control whilst the peripheral interface controller (PIC) for digital control implementation. Comparisons are made on the(More)
This paper is focusing on optimizing harmonic content in Sinusoidal Pulse Width Modulation (SPWM) design. This SPWM is designed using VHDL and implemented on ALTERA (DE2-70 board). SPWM output is generated by intersection between sine signal and triangle signal. Sine signal is the reference waveform and triangle waveform is the carrier waveform. When value(More)
A new single-phase controlled rectifier using single-phase matrix converter (SPMC) with fully controllable regenerative capabilities is presented. PWM technique was used to calculate the switch duty ratio to synthesize the output. Safe commutation strategy was implemented to avoid voltage spikes due to inductive load. Selected simulation and experimental(More)
This paper presents the operation of buck and boost rectifier using a single-phase matrix converter topology. Due to symmetrical and bi-directional capabilities the topology is made to operate as buck and boost rectifier. This is facilitated through proper switching control algorithm. The circuit behaviour is confirmed by MATLAB/Simulink simulation results(More)
This paper presents an optimized sinusoidal pulse width modulation (SPWM) technique to control single phase matrix converter (SPMC) desirable for implementation in application specific integrated circuit (ASIC) or field programmable gate array (FPGA). The use of VHDL coding makes it adaptable for other design applications. The result provides an(More)
This paper is concerned on FPGA design for control implementations of the Single-Phase Matrix Converter (SPMC) operating as a single-phase Inverter. The Sinusoidal Pulse Width Modulation (SPWM) technique is used to synthesize the output voltage with. The power circuit uses the Insulated Gate Bipolar Transistor (IGBT) as switching device in the SPMC(More)