A CMOS switching power amplifier for ΔΣ digitized polar RF transmitter

A CMOS switching power amplifier for ΔΣ digitized polar RF transmitter

A CMOS switching power amplifier for ΔΣ digitized polar RF transmitter is implemented in 0.18-μm process. A current source is introduced in the proposed switching PA to achieve ΔΣ digitized amplitude modulation. The modulation with the current source is suitable for high speed modulated signal such...

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Bibliographische Detailangaben
Hauptverfasser: Ji-Seon Paek, Hyun-Yong Lee, Hongtak Lee, Songcheol Hong
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Amplitude modulation
CMOS technology
Communication switching
Current modulation
Digital modulation
Linearity
polar transmitter
Power amplifiers
Power generation
Radio frequency
Radio transmitters
Radiofrequency amplifiers
sigma-delta
switch-mode CMOS power amplifier
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Beschreibung
Zusammenfassung:A CMOS switching power amplifier for ΔΣ digitized polar RF transmitter is implemented in 0.18-μm process. A current source is introduced in the proposed switching PA to achieve ΔΣ digitized amplitude modulation. The modulation with the current source is suitable for high speed modulated signal such as an oversampled ΔΣ signal. The PA operates at 910 MHz with the maximum output power of 23.5 dBm and power efficiency of 55.4% at the maximum output power. The maximum output power range with the current source modulation is 31 dB.
ISSN:2164-2958
2164-2974
DOI:10.1109/RWS.2010.5434218