A chip for linearization of RF power amplifiers using predistortion based on a bit-parallel complex multiplier
Author
Summary, in English
This paper presents a custom chip for linearization of RF power amplifiers using digital predistortion. The chip has been implemented in a standard digital 0.8 mu m CMOS process with standard static cells and single-phase clocking. A systolic complex multiplier based on distributed arithmetic constitutes the core of the chip. The nonlinear function is realized with a look-up table containing complex gain factors applied to the complex multiplier. Maximum clock frequency was found by means of simulation to be 105 MHz corresponding to 21 Msamples/s throughput with 3 W power consumption using 5 V supply voltage. The fabricated chip is fully functional and has been measured up to 60 MHz clock frequency with 825 mW power consumption with 3.3 V supply voltage. Operation at 1.5 V supply voltage allows 10 MHz clock frequency with 35 mW power consumption.
Publishing year
2000
Language
English
Pages
25-30
Publication/Series
Analog Integrated Circuits and Signal Processing
Volume
22
Issue
1
Document type
Journal article
Publisher
Springer
Topic
- Electrical Engineering, Electronic Engineering, Information Engineering
Status
Published
ISBN/ISSN/Other
- ISSN: 0925-1030