Search for dissertations about: "band-pass filters"

Showing result 1 - 5 of 10 swedish dissertations containing the words band-pass filters.

  2. 1. Tunable Filters based on Ferroelectrics and Semiconductor Varactors

    Author : Anders Eriksson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High Temperature Superconductor HTS ; quality factor; tunable filter; phase transition; circular disc resonator; Cu BCB multilayer; KTaO3; ferroelectrics; dual mode filter; SrTiO3;

    Abstract : Experimental investigation and development of tunable microwave filters, based on single crystals of SrTiO3 (STO) and KTaO3 (KTO), form the main work of this thesis. The dielectric properties of STO and KTO crystals are evaluated experimentally for a wide temperature range, with a DC bias, using parallel-plate resonators with High Temperature Superconductor (HTS) and normal metal (Cu) electrodes. READ MORE

  4. 2. ADC modeling from a system perspective and design of RF-sampling radio receivers

    Author : Kalle Folkesson; Linköpings universitet; []
    Keywords : ;

    Abstract : The analog-to-digital converter (ADC) is the key component in many modem electronic systems. Examples are wire-line communication systems such as digital subscriber line modems, wireless communication systems such as radio receivers, and sensor systems such as military radar. READ MORE

  5. 3. Modeling and on-line optimization of cone crushers

    Author : Khalid Atta; Matti Vilkko; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reglerteknik; Control Engineering;

    Abstract : This licentiate thesis deals with the Modeling, Control, and On-line optimization of Cone Crushers. Cone crushers are used for size reduction of minerals and are considered as a central element in many mineral processing plants. READ MORE

  6. 4. Reconfigurable and Broadband Circuits for Flexible RF Front Ends

    Author : Naveed Ahsan; Aziz Ouacha; Atila Alvandpour; Thierry Parra; Linköpings universitet; []
    Keywords : TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : Most of today’s microwave circuits are designed for specific function and special need. There is a growing trend to have flexible and reconfigurable circuits. Circuits that can be digitally programmed to achieve various functions based on specific needs. READ MORE

  7. 5. Digitally controlled analog multiply-accumulate units

    Author : Mattias Duppils; Linköpings universitet; []
    Keywords : TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : This thesis is about digitally controlled analog multiplier-accumulator (MAC) units and their utilization in communications applications. These units are implemented as switched-capacitor circuits, designed with switches (MOS transistors), capacitors (MOS transistors), and amplifiers (MOS transistors); using a CMOS technology. READ MORE