Abstract
The efficient use of the power budget in small satellite applications is of primary importance because of the reduced size of the power sources. Unfortunately, high efficiency in power amplifiers (PA) is strongly related to non-linearities and hence distortion. In this paper a digital architecture for the linearization of switched mode PAs is proposed, and a circuit to detect the phase shift and the CORDIC algorithm to correct that phase as well as to compute the magnitude are developed. The results show that linearity is improved by 20 dB for a system with a bandwidth of 9.6 kHz for a loop gain of 10 and 400 ns of system delay. The circuit, synthesized in a FPGA consumes a total of 33.3 mW.
Original language | English |
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Title of host publication | Proceedings - 2010 IEEE International Conference on Electronics, Circuits and Systems, ICECS 2010 |
Place of Publication | Piscataway, NJ |
Publisher | IEEE |
Pages | 890-893 |
Number of pages | 4 |
ISBN (Electronic) | 978-1-4244-8157-6 |
ISBN (Print) | 978-1-4244-8155-2 |
DOIs | |
Publication status | Published - Dec 2010 |
Event | 2010 IEEE International Conference on Electronics, Circuits and Systems, ICECS 2010 - Divani Caravel Hotel, Athens, Greece Duration: 12 Dec 2010 → 15 Dec 2010 Conference number: 17 |
Conference
Conference | 2010 IEEE International Conference on Electronics, Circuits and Systems, ICECS 2010 |
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Country/Territory | Greece |
City | Athens |
Period | 12/12/10 → 15/12/10 |
Keywords
- CORDIC
- Cartesian feedback
- linearization
- phase alignment