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Qualcomm pits CMOS against GaAs for cellphone front ends

3/15/2013 10:56 AM EDT
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Rchandta1
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re: Qualcomm pits CMOS against GaAs for cellphone front ends
Rchandta1   3/15/2013 3:41:56 PM
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What is the efficiency of CMOS PA? GaAs and GaN PAs are known for higher power efficiency.

Traces
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re: Qualcomm pits CMOS against GaAs for cellphone front ends
Traces   3/15/2013 5:51:05 PM
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Doesn't matter, dude, esp. for protocols where the pdf peaks well below the maximum transmitted power. Can GaAs PAs compete with drain modulated CMOS at Pmax-20dB?

VNP
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re: Qualcomm pits CMOS against GaAs for cellphone front ends
VNP   3/16/2013 2:08:31 PM
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This article describes only the tip of the iceberg. The whole story is that Qualcomm has implemented in the digital domain envelope tracking technique along with digital predistortion. It is important note especially if we talk about LTE standard with carrier aggregation. So, RF DSP rules.

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