Low frequency dithering technique for linearization of current mode class D amplifiers
FA Malekzadeh, A van Roermund… - 2012 IEEE/MTT-S …, 2012 - ieeexplore.ieee.org
2012 IEEE/MTT-S International Microwave Symposium Digest, 2012•ieeexplore.ieee.org
Combination of a band-pass signal with a low frequency sinusoid signal, also known as
dithering, will linearize the performance and reduce the reactive power loss of class D
amplifiers. The expectations are verified through realization and measurement of a 2 watt
current mode LDMOS class D amplifier operating at 2.014 GHz. The drain efficiency is
enhanced from 55 to 59 percent, while giving ACPR levels below− 33dBc for first WCDMA
adjacent channel.
dithering, will linearize the performance and reduce the reactive power loss of class D
amplifiers. The expectations are verified through realization and measurement of a 2 watt
current mode LDMOS class D amplifier operating at 2.014 GHz. The drain efficiency is
enhanced from 55 to 59 percent, while giving ACPR levels below− 33dBc for first WCDMA
adjacent channel.
Combination of a band-pass signal with a low frequency sinusoid signal, also known as dithering, will linearize the performance and reduce the reactive power loss of class D amplifiers. The expectations are verified through realization and measurement of a 2 watt current mode LDMOS class D amplifier operating at 2.014 GHz. The drain efficiency is enhanced from 55 to 59 percent, while giving ACPR levels below −33dBc for first WCDMA adjacent channel.
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