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60412 |
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|a Chung, SungWon
|e author
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|a Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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|a Massachusetts Institute of Technology. Microsystems Technology Laboratories
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|a Dawson, Joel L.
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|a Dawson, Joel L.
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|a Chung, SungWon
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|a Dawson, Joel L.
|e author
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|a A 73.1dB SNDR Digitally Assisted Subsampler for RF Power Amplifier Linearization Systems
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|b VLSI-TSA,
|c 2011-01-07T21:44:17Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/60412
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|a conference website
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|a We present a digitally assisted subsampler, designed to serve as the downconversion path in adaptive predistorters for 800MHz-5.8GHz RF power amplifiers. We use digital averaging to overcome the noise folding problems of subsampling, obtaining a final SNDR of 73.1dB for signals centered about a 2.4GHz carrier. Using quadrature subsampling, we obtain both the I and Q samples from the same physical path and thereby eliminate IQ gain mismatch. When used as part of an adaptive predistortion system, the subsampler enables an EVM improvement of 3.2% and distortion products suppression of up to 7.6dB for 802.11g signals. The subsampler IC, designed in a 90nm CMOS process, consumes 6.0mW from a 1.2V supply.
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|a Focus Center Research Program. Focus Center for Circuit & System Solutions
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|a en_US
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|a Article
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|t 16th International Symposium on VLSI Technology, Systems and Applications (2009 VLSI-TSA)
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