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  • 1.
    Haque, Muhammad Fahim Ul
    et al.
    Linköping University, Department of Electrical Engineering, Computer Engineering. Linköping University, Faculty of Science & Engineering.
    Johansson, Ted
    Linköping University, Department of Electrical Engineering, Integrated Circuits and Systems. Linköping University, Faculty of Science & Engineering.
    Liu, Dake
    Linköping University, Department of Electrical Engineering, Computer Engineering. Linköping University, Faculty of Science & Engineering.
    Combined RF and Multilevel PWM Switch Mode Power Amplifier2013In: Norchip Conference, IEEE , 2013, p. 1-4Conference paper (Refereed)
    Abstract [en]

    This paper presents a novel power amplifier (PA) architecture based on the combination of radio frequency pulse width modulation (RFPWM) and multilevel PWM. The architecture provides better dynamic range at high carrier frequency compared to RFPWM. The benefits of this architecture over multilevel PWM are that it only requires a single PA and no combiner. The average efficiency for an 802.11g baseband signal is better than multilevel PWM. Our results also shows that the proposed technique exhibit a constant dynamic range at carrier frequency of 3, 4 and 5 GHz, in contrast to RFPWM which shows a decrease in dynamic range for increase in carrier frequency.

  • 2.
    Haque, Muhammad Fahim Ul
    et al.
    Linköping University, Department of Electrical Engineering, Computer Engineering. Linköping University, Faculty of Science & Engineering.
    Johansson, Ted
    Linköping University, Department of Electrical Engineering, Integrated Circuits and Systems. Linköping University, Faculty of Science & Engineering.
    Liu, Dake
    Linköping University, Department of Electrical Engineering, Computer Engineering. Linköping University, Faculty of Science & Engineering.
    Combined RF and Multiphase PWM Transmitter2015In: 2015 European Conference on Circuit Theory and Design (ECCTD), IEEE , 2015, p. 264-267Conference paper (Refereed)
    Abstract [en]

    This paper presents two novel transmitter architectures based on the combination of radio-frequency pulse-width modulation and multiphase pulse-width modulation. The proposed transmitter architectures provide good amplitude resolution and large dynamic range at high carrier frequency, which is problematic with existing radio-frequency pulse-width modulation based transmitters. They also have better power efficiency and smaller chip area compared to multiphase pulse-width modulation based transmitters.

  • 3.
    Haque, Muhammad Fahim Ul
    et al.
    Linköping University, Department of Electrical Engineering, Computer Engineering. Linköping University, Faculty of Science & Engineering.
    Johansson, Ted
    Linköping University, Department of Electrical Engineering, Integrated Circuits and Systems. Linköping University, Faculty of Science & Engineering.
    Liu, Dake
    Linköping University, Department of Electrical Engineering, Computer Engineering. Linköping University, Faculty of Science & Engineering.
    Combined RF and Multiphase PWM Transmitter2015Conference paper (Other academic)
  • 4.
    Haque, Muhammad Fahim Ul
    et al.
    Linköping University, Department of Electrical Engineering, Computer Engineering. Linköping University, Faculty of Science & Engineering.
    Johansson, Ted
    Linköping University, Department of Electrical Engineering, Integrated Circuits and Systems. Linköping University, Faculty of Science & Engineering.
    Liu, Dake
    Linköping University, Department of Electrical Engineering, Computer Engineering. Linköping University, Faculty of Science & Engineering.
    Modified Band-limited Pulse-Width Modulated Polar Transmitter2015Conference paper (Other academic)
  • 5.
    Haque, Muhammad Fahim Ul
    et al.
    Linköping University, Department of Electrical Engineering, Computer Engineering. Linköping University, Faculty of Science & Engineering.
    Johansson, Ted
    Linköping University, Department of Electrical Engineering, Integrated Circuits and Systems. Linköping University, The Institute of Technology.
    Liu, Dake
    Linköping University, Department of Electrical Engineering, Computer Engineering. Linköping University, The Institute of Technology.
    Modified Multilevel PWM Switch Mode Power Amplifier2014Conference paper (Other academic)
  • 6.
    Touqir Pasha, Muhammad
    et al.
    Linköping University, Department of Electrical Engineering, Integrated Circuits and Systems. Linköping University, Faculty of Science & Engineering.
    Haque, Muhammad Fahim Ul
    Linköping University, Department of Electrical Engineering, Computer Engineering. Linköping University, Faculty of Science & Engineering.
    Ahmad, Jahanzeb
    University of the West of England, UK.
    Johansson, Ted
    Linköping University, Department of Electrical Engineering, Integrated Circuits and Systems. Linköping University, Faculty of Science & Engineering.
    An All-Digital Polar PWM Transmitter2018Conference paper (Other academic)
  • 7.
    Ul Haque, Muhammad Fahim
    et al.
    Linköping University, Department of Electrical Engineering, Computer Engineering. Linköping University, Faculty of Science & Engineering.
    Johansson, Ted
    Linköping University, Department of Electrical Engineering, Integrated Circuits and Systems. Linköping University, Faculty of Science & Engineering.
    Liu, Dake
    Linköping University, Department of Electrical Engineering, Computer Engineering. Linköping University, Faculty of Science & Engineering.
    Large dynamic range PWM transmitter2016Conference paper (Other (popular science, discussion, etc.))
  • 8.
    Ul Haque, Muhammad Fahim
    et al.
    Linköping University, Department of Electrical Engineering, Computer Engineering. Linköping University, Faculty of Science & Engineering.
    Johansson, Ted
    Linköping University, Department of Electrical Engineering, Integrated Circuits and Systems. Linköping University, Faculty of Science & Engineering.
    Liu, Dake
    Linköping University, Department of Electrical Engineering, Computer Engineering. Linköping University, Faculty of Science & Engineering.
    Power Efficienct Band-limited Pulse Width Modulated Transmitter2015Conference paper (Other (popular science, discussion, etc.))
1 - 8 of 8
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