Zbigniew Galias1, Colm A. Murphy2, Michael Peter Kennedy3 and Maciej J. Ogorza lek1 1 Department of Electrical Engineering, University of Mining and Metallurgy, al. Mickiewicza 30, 30-059 Krak ow, Poland 2 Silicon and Software Systems, Ballymoss Rd., Sandyford Industrial Estate, Dublin 18, Ireland 3 Department of Electronic and Electrical Engineering, University College, Dublin 4, Ireland ABSTR...

This paper presents design, fabrication and characterization of two differential Colpitts voltage controlled oscillator (VCOs) cross-coupled VCO (CC-VCO) and double cross-coupled VCO (DC-VCO) in InGaP/GaAs HBT technology. Their main parameters like the oscillation frequency, output power and phase noise performance are measured and compared with other recently published studies. In the cores of...

In laparoscopic surgery for colorectal and gastric cancer, it is difficult to locate the tumor in cavity excision. Tumors colon or stomach are blocked by mucous membranes; thus, view from obscured. Therefore, determine location of tumor, a marker can be installed around found using sensor. Until now, most clip-detectors that have been developed detect tumors either cancer. The research on devel...

The majority of contemporary design tools do not still contain steady-state algorithms, especially for the autonomous systems. This is mainly caused by insufficient accuracy of the algorithm for numerical integration, but also by unreliable steady-state algorithms themselves. Therefore, in the paper, a very stable and efficient procedure for the numerical integration of nonlinear differential-a...

Several state-of-the-art wireless receiver architectures are presented including the traditional superheterodyne, the image-reject heterodyne, the direct-conversion, and the very-low intermediate frequency (VLIF). The case studies are followed by a detailed view of receiver building blocks: lownoise amplifiers (LNA), mixers, and voltage-controlled oscillators (VCO). Two popular topologies curre...