DC Field | Value | Language |
---|---|---|
dc.contributor.author | Choi, Hyunseok | ko |
dc.contributor.author | Lee, Yumi | ko |
dc.contributor.author | Hong, Songcheol | ko |
dc.date.accessioned | 2014-08-29T01:51:43Z | - |
dc.date.available | 2014-08-29T01:51:43Z | - |
dc.date.created | 2014-04-22 | - |
dc.date.created | 2014-04-22 | - |
dc.date.issued | 2014-03 | - |
dc.identifier.citation | IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, v.62, no.3, pp.579 - 589 | - |
dc.identifier.issn | 0018-9480 | - |
dc.identifier.uri | http://hdl.handle.net/10203/188887 | - |
dc.description.abstract | A digitally modulated CMOS power amplifier (DPA) for a polar transmitter with a high dynamic range is presented. To improve local oscillator (LO) leakage, which limits the minimum output power of the DPA, the unit amplifier cell of the DPA employs a balanced mixer-type LO canceller at the power stage and a virtual ground is introduced in the layout of the output-power combining networks. A high dynamic range of the output power is simply achieved by adjusting gate-bias voltage of a cascode transistor in each power amplifier (PA) cell using a digitally controlled bias generator. This architecture allows a few-mA drain current at a low Tx power level without degrading the linearity. An array of unit PA cells is segmented to have a 10-bit amplitude resolution, and the bias generator is designed to have 8-bit control of the average output power. The peak output power is 24.4 dBm with an overall efficiency of 43% at 800 MHz. The total output dynamic range is 102.8 dB. A simple static pre-distortion helps the DPA achieve an average efficiency of 35% with a root mean square error vector magnitude of 3.59% while delivering linear output power of 22 dBm for WCDMA. The range of the digital transmit-power control for the WCDMA signal is 49.7 dB. This chip is fabricated in a 65-nm RF CMOS process. | - |
dc.language | English | - |
dc.publisher | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | - |
dc.subject | AMPLITUDE MODULATOR | - |
dc.subject | TRANSMITTER | - |
dc.subject | EDGE | - |
dc.title | A Digital Polar CMOS Power Amplifier With a 102-dB Power Dynamic Range Using a Digitally Controlled Bias Generator | - |
dc.type | Article | - |
dc.identifier.wosid | 000332763100021 | - |
dc.identifier.scopusid | 2-s2.0-84898597519 | - |
dc.type.rims | ART | - |
dc.citation.volume | 62 | - |
dc.citation.issue | 3 | - |
dc.citation.beginningpage | 579 | - |
dc.citation.endingpage | 589 | - |
dc.citation.publicationname | IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | - |
dc.identifier.doi | 10.1109/TMTT.2014.2298386 | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Hong, Songcheol | - |
dc.contributor.nonIdAuthor | Choi, Hyunseok | - |
dc.contributor.nonIdAuthor | Lee, Yumi | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | CMOS RF power amplifier (PA) | - |
dc.subject.keywordAuthor | digital amplitude modulation | - |
dc.subject.keywordAuthor | digitally modulated PA | - |
dc.subject.keywordAuthor | dynamic range | - |
dc.subject.keywordAuthor | local oscillator (LO) leakage | - |
dc.subject.keywordAuthor | polar transmitter | - |
dc.subject.keywordAuthor | Tx power control | - |
dc.subject.keywordAuthor | WCDMA | - |
dc.subject.keywordPlus | AMPLITUDE MODULATOR | - |
dc.subject.keywordPlus | TRANSMITTER | - |
dc.subject.keywordPlus | EDGE | - |
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