Now showing items 1-20 of 337

    • 5GHz CMOS all-pass filter-based true time delay cell 

      Aghazadeh, Seyed Rasoul; Martínez García, Herminio; Saberkari, Alireza (2018-12-22)
      Article
      Open Access
      Analog CMOS time-delay cells realized by passive components, e.g., lumped LC delay lines, are inefficient in terms of area for multi-GHz frequencies. All-pass filters considered as active circuits can, therefore, be the ...
    • 5GHz CMOS all-pass filter-based true time delay cell 

      Aghazadeh Dafsari, Seyed Rasoul; Martínez García, Herminio; Saberkari, Alireza (Multidisciplinary Digital Publishing Institute (MDPI), 2020)
      Part of book or chapter of book
      Open Access
      Analog CMOS time-delay cells realized by passive components, e.g., lumped LC delay lines, are inefficient in terms of area for multi-GHz frequencies. All-pass filters considered as active circuits can, therefore, be the ...
    • 5GHz CMOS all–pass filter–based true time delay cell 

      Aghazadeh Dafsari, Seyed Rasoul; Martínez García, Herminio; Saberkari, Alireza (2018-12-22)
      Article
      Open Access
      Analog CMOS time-delay cells realized by passive components, e.g., lumped LC delay lines, are inefficient in terms of area for multi-GHz frequencies. All-pass filters considered as active circuits can, therefore, be the ...
    • A 250-ps integrated ultra-wideband timed array beamforming receiver in 0.18 um CMOS 

      Aghazadeh Dafsari, Seyed Rasoul; Martínez García, Herminio; Aragonès Cervera, Xavier; Saberkari, Alireza (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference lecture
      Restricted access - publisher's policy
      This paper presents a 4-channel ultra-wideband (UWB) timed array beamforming receiver designed in a standard 0.18-um CMOS technology. The proposed timed array receiver achieves a maximum delay of 250 ps at the maximum beam ...
    • A comparative study of different optimization methods for resonance half-bridge converter 

      Salehi, Navid; Martínez García, Herminio; Velasco Quesada, Guillermo (2018-12-02)
      Article
      Open Access
      The LLC resonance half-bridge converter is one of the most popular DC-DC converters and could easily inspire researchers to design a high-efficiency and high-power-density converter. LLC resonance converters have diverse ...
    • A novel high step-up secondary side impedance source full-bridge converter 

      Salehi, Navid; Martínez García, Herminio; Velasco Quesada, Guillermo (International Centre for Numerical Methods in Engineering (CIMNE), 2018)
      Conference report
      Open Access
      In order to suppress the voltage stress of semiconductor devices, and solve the reverse recovery problem of diodes by decreasing the duty cycle of switches, impedance source converters could be consider as a solution. In ...
    • A PLL control for self-tuning of parallel wireless power transfer receivers utilizing switch-mode gyrator emulated inductors 

      Saad, M.A.; Martínez García, Herminio; Alarcón Cot, Eduardo José (2017)
      Conference lecture
      Open Access
      In multiple receivers wireless power transfer (WPT) systems, it is preferable to retune the resonant frequency of every receiver to the transmitter operating frequency in front of frequency mismatches. This paper discusses ...
    • Active inductor-based tunable impedance matching network for RF power amplifier application 

      Saberkari, Alireza; Ziabakhsh, Saman; Martínez García, Herminio; Alarcón Cot, Eduardo José (2015-08)
      Article
      Open Access
      This paper presents the use of a new structure of active inductor named cascoded flipped-active inductor (CASFAI) in a T-type high-pass tunable output matching network of a class-E RF power amplifier (RFPA) to control the ...
    • Active inductor–based tunable impedance matching network for RF power amplifier application 

      Saberkari, Alireza; Ziabakhsh, Saman; Martínez García, Herminio; Alarcón Cot, Eduardo José (2016-01)
      Article
      Open Access
    • An agile supply modulator with improved transient performance for power efficient linear amplifier employing envelope tracking techniques 

      Prakash, Suraj; Martínez García, Herminio; Naderi, Mohammad H.; Lee, Hoi; Silva Martinez, José (Institute of Electrical and Electronics Engineers (IEEE), 2019-08-09)
      Article
      Open Access
      This article presents an agile supply modulator with optimal transient performance that includes improvement in rise time, overshoot and settling time for the envelope tracking supply in linear power amplifiers. For this ...
    • An approach to renewable energies courses for Energy Engineering students in the framework of the European Higher Education Area (EHEA) 

      Martínez García, Herminio; García Vílchez, Encarna (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Open Access
    • An efficient CMOS LDO-assisted DC/DC buck regulator 

      Shirmohammadli, V.; Saberkari, Alireza; Martínez García, Herminio; Alarcón Cot, Eduardo José (2016)
      Conference report
      Restricted access - publisher's policy
      In this paper, a new structure based on linear-assisted DC-DC buck converter principle is proposed. Using a segmented LDO regulator instead of the conventional linear one in the hybrid scheme, reduces the difference between ...
    • An efficient CMOS LDO–assisted DC/DC buck regulator 

      Shirmohammadli, V.; Saberkari, Alireza; Martínez García, Herminio; Alarcón Cot, Eduardo José (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Open Access
    • An energy efficient envelope tracking technique for demanding wireless standards 

      Prakash, Suraj; Martínez García, Herminio; Naderi, Mohammad H.; Lee, Hoi; Silva Martinez, José (2020)
      Part of book or chapter of book
      Restricted access - publisher's policy
      The chapter deals with energy efficient envelope tracking solution in a power amplifier system for demanding wireless standards.
    • An LPV Fractional Hayami Model for Canal Control 

      Bolea Monte, Yolanda; Martínez González, Rubén; Grau Saldes, Antoni; Martínez García, Herminio (IEEE Press. Institute of Electrical and Electronics Engineers, 2011)
      Conference report
      Restricted access - publisher's policy
    • An LPV Fractional Model for Canal Control 

      Bolea Monte, Yolanda; Martínez González, Rubén; Grau Saldes, Antoni; Martínez García, Herminio (PERGAMON PRESS. IFAC SERIES., 2009)
      Conference report
      Restricted access - publisher's policy
      In this paper an LPV non-integer order control model of an irrigation canal is derived from system identification experiments. This model is experimentally obtained by using the described LPV fractional identification ...
    • An output-capacitorless FVF-based low-dropout regulator for power management applications 

      Shirmohammadli, V.; Saberkari, Alireza; Martínez García, Herminio; Alarcón Cot, Eduardo José (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
      This paper presents an output-capacitorless low dropout (LDO) regulator based on improved flipped voltage follower power stage for use in power management circuits. A new error amplifier (EA) structure, named as gain-bandwidth ...
    • Aplicación del protocolo LTI a la resolución de ejercicios en una plataforma MOODLE 

      Cosp Vilella, Jordi; Meseguer Pallarès, Roc; Martínez García, Herminio (Universitat Politècnica de València, 2015)
      Conference report
      Open Access
      This paper presents the development of an application to propose complex exercises to students on a Moodle platform by connecting to an external server through LTI (Learning Tools Interoperability) protocol.The system has ...
    • Aplicación del protocolo LTI a la resolución de ejercicios en una plataforma Moodle 

      Cosp Vilella, Jordi; Meseguer Pallarès, Roc; Martínez García, Herminio (2015)
      Lecture
      Open Access
    • Application of modified current-mode one-cycle control in a linear-assisted DC/DC regulator 

      Martínez García, Herminio (2015)
      Conference report
      Open Access
      Linear-assisted DC/DC converters are structures that allow to take advantages of the two classic alternatives in the design of power supply systems: Voltage linear regulators (classic NPN topology or LDO -low dropout-) and ...