Zulfiqar Mohammed

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This paper describes a fast lock scheme for phaselocked loops (PLLs). The proposed scheme utilizes mostly digital logic and control to achieve significant reduction in PLL lock acquisition time, which enables dynamic power cycling for various sub-systems on SOC designs. Multiple Self-Bias PLLs having fast lock schemes were designed to operate at VCO(More)
This paper presents experimental investigations into the development of a real-time hybrid control scheme for sway and position control of a three dimensional (3D) gantry crane system. System responses including positions of the trolley, rail and payload and payload sway are examined. Initially, a PD controller is developed for position control of the(More)
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