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High power amplifier based on a transformer-type power combiner in CMOS technology

Javidan, J ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1109/TCSII.2010.2082890
  3. Publisher: 2010
  4. Abstract:
  5. In this brief, a transformer-type power combiner for a fully integrated high-power CMOS power amplifier (PA) is presented. The proposed power combiner is composed of a number of transformers that, unlike the ones in conventional approaches, have different sizes. This leads to higher efficiency and smaller chip area. After considering several power stage topologies, analysis and optimization of the transformer network (the power combiner) are presented. To demonstrate the advantages of the proposed architecture, a 900-MHz CMOS PA with the proposed power combiner was implemented with a 0.18-μm radio-frequency CMOS process. The amplifier achieved an efficiency value of 24% at the maximum output power of 29.5 dBm
  6. Keywords:
  7. Power amplifier (PA) ; power combiner ; Transformer ; Chip areas ; CMOS PA ; CMOS power amplifiers ; CMOS processs ; CMOS technology ; Conventional approach ; Different sizes ; Efficiency optimization ; Fully integrated ; High power amplifier ; High-power ; Higher efficiency ; Maximum output power ; Power stage ; Proposed architectures ; Radio frequencies ; CMOS integrated circuits ; Optimization ; Power transformers
  8. Source: IEEE Transactions on Circuits and Systems II: Express Briefs ; Volume 57, Issue 11 , November , 2010 , Pages 838-842 ; 15497747 (ISSN)
  9. URL: http://ieeexplore.ieee.org/document/5618552/?reload=true