Aleksandar Tasic

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A multistandard/multiband adaptive voltage-controlled oscillator (VCO) satisfying the phase-noise requirements of both second- and third-generation wireless standards is described in this paper (1.8-GHz DCS1800, 2.1-GHz wide-band code division multiple access, and 2.4-GHz wireless local area network, Bluetooth, and digital enhanced cordless(More)
Rather delicate, distribution of the system specifications to the individual receiver blocks has not gained any exactness for the last decades. When distributing the system specifications to each of the blocks in the receive chain, it is rather common practice to consider each performance parameter separately. However, as both the noise and the linearity(More)
Analog RF front-end circuits are typically designed to perform one specific task, while key parameters such as dynamic range, bandwidth and selectivity are fixed by the hardware design and not by the communication system in an adaptive way. As a result, today’s receiver topologies are designed to function under the most stringent conditions, which increases(More)
PURPOSE The goals of this study were to demonstrate the frequency of infrarenal abdominal aortic aneurysm (AAA) in patients with pseudoexfoliation (PEX) syndrome (PEXS) and PEX glaucoma (PEXG), and to determine whether limited screening for AAA in specific subgroups of patients with PEX is reasonable and justifiable. MATERIALS AND METHODS This prospective(More)
In this paper, new receiver concepts and CMOS circuits for future wireless communications applications are introduced. The concepts derived are applied to a few classes of wireless communications standards that are broad-band at radio frequencies and/or require a broad-band baseband circuitry. Multimode multiband operation and adaptivity as key requirements(More)
So far, oscillators have been designed to perform a specific task while the key parameters such as phase-noise and power consumption are set by the hardware design and not by the communication system in an adaptive way. As the communication channel is often subject to changes, the conditions under which the oscillator operates should be changed as well.(More)
Interpretation of phase-noise generating mechanism in oscillators relies on approximate and numerical calculations for analysis, and simulation tools for synthesis. In this paper, a comprehensive, yet intuitive, phase-noise model is derived as a function of oscillator circuit parameters, suiting both analysis and synthesis of oscillators. Contributions of(More)
Human dirofilariosis is a relatively rare infection caused by filarial worms of the genus Dirofilaria. We herein report the first case of human subcutaneous dirofilariosis in the southeastern part of Serbia. A complete alive nematode was removed from a nodule in the periorbital region of a 50-year-old woman. The nematode was morphologically identified as a(More)
THE explosive demand in wireless-capable devices, especially with the proliferation of multiple standards, indicates a great opportunity for adoption of wireless technology at a mass-market level. The communication devices of both today and the future will have not only to allow for a variety of applications, supporting the transfer of characters, audio,(More)