Sergio Chaparro

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In this letter the authors present a comprehensive study of the threshold current and its temperature dependence in GaAsSb-based quantum well edge-emitting lasers for emission at 1.3 ␮m. It is found that at room temperature, the threshold current is dominated by nonradiative recombination accounting for more than 90% of the total threshold current density.(More)
This paper presents the design using geometric programming of a merged CMOS LNA-Mixer cell, intended for bluetooth application at 2.45GHz. A rigorous noise formulation taking into account on chip inductors non-idealities and parameters from inductor measurement results is provided. Design considerations to achieve geometric programming suitable expressions(More)
This document builds on the inputs of the Working Group on Alternatives to Incarceration, was conducted under the coordination of the Government of Colombia as Technical Secretariat, with the assistance and support of the Executive Secretariat of the Inter-American Drug Abuse Control Commission (CICAD), it provides a selection of alternatives to(More)
This paper presents the accurate synthesis of a narrow-band CMOS Low Noise Amplifier (LNA) using an optimization-based approach. Multi-objective information and the corners of the fabrication process are used in the synthesizer to simultaneously optimize impedance matching, performance parameters and circuit robustness. The synthesis approach combines the(More)
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