Sökning: "class D amplifier"

Visar resultat 1 - 5 av 13 uppsatser innehållade orden class D amplifier.

  1. 1. Current-Mode Class D Power Amplifier for 2.4GHz Wi-Fi

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Yann Jean Michael Pirot; [2023]
    Nyckelord :Power Amplifier; Wifi; Digital Power Amplfier; Class D; RFIC; Analogue; Effektförstärkare; Wifi; digital förstärkare; klass D; analog;

    Sammanfattning : Modern wireless communication techniques employed in the Wi-Fi® protocol, such as orthogonal frequency-division multiplexing exhibit analogue signals with high peak-to-average power ratio. Therefore, power amplifiers for Wi-Fi suffer from low efficiency when operating in back-off mode, away from their maximum efficiency at peak power. LÄS MER

  3. 2. Design of a power amplifier for NB-IoT

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Rajeshwari Yogi; [2018]
    Nyckelord :NB-IoT; Power amplifier; Inverse class D power amplifer; Technology and Engineering;

    Sammanfattning : An inverse class D power amplifier and a class A power amplifier are designed at schematic level for 20 dBm power class and NB-IoT specification in 65 nm CMOS technology. A suitable switch mode supply modulator is also designed. LÄS MER

  4. 3. Simulation and Construction of a Half-Bridge Class D Audio Amplifier

    Kandidat-uppsats, Uppsala universitet/Fasta tillståndets elektronik

    Författare :Johan Engstrand; Niklas Kavathatzopoulos; Jonathan Nordenholm; [2018]
    Nyckelord :amplifier; class D; half-bridge; simulation; LTspice; KiCad; förstärkare; klass D; halvbrygga;

    Sammanfattning : Usage of class D audio amplifiers has become increasingly widespread in recent years, mainly due to their high efficiency, which can reach almost 100 %. Class D amplifiers can also be compact, making them suitable for mobile applications. In contrast, the most efficient conventional amplifiers such as class B can reach a maximum efficiency of 78. LÄS MER

  5. 4. Analys av designparametrar för trådlösa bärbara Bluetooth-högtalare

    M1-uppsats, KTH/Hälsoinformatik och logistik

    Författare :Markus Saviaro; [2018]
    Nyckelord :Bluetooth speaker; Class D-amplification; Sound measurement; Portable speaker; Speaker technology; Bluetooth-högtalare; Klass D-förstärkning; Ljudmätning; Bärbar högtalare; Högtalarteknik;

    Sammanfattning : I denna rapport utreds vilka komponenter en bärbar trådlös Bluetooth-högtalarebestår av och de designparametrar som en presumtiv konstruktör bör ta hänsyntill. Egenskaperna hos sex på marknaden förekommande högtalarmodeller och dekonstruktionslösningar som används i dessa undersöktes. LÄS MER

  7. 5. Development of a Class D motor amplifier for a next-generation mechanism control electronics

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Juan Camilo Garcia Hernandez; [2016]
    Nyckelord :Power; electronics; satellites; BLDC; sinusoidal; commutation; control; PID; class D amplifier; PWM;

    Sammanfattning : This thesis was written at Airbus DS GmbH in Friedrichshafen, Germany, as part of a project which aims to develop a new generation of class-D power amplification circuits for sinusoidal commutating motors controlling the movement of different mechanisms in satellites. Currently used topologies have disadvantages such as high power loss, analog controlling and high degree of signal distortion. LÄS MER