Conference Proceeding

A highly efficient 5.8 GHz CMOS transmitter IC with robustness over PVT variations

Dept. of Electr. Eng. & Comput. Sci., KAIST, Daejeon, South Korea
06/2010; DOI:10.1109/RFIC.2010.5477256 pp.403 - 406 In proceeding of: Radio Frequency Integrated Circuits Symposium (RFIC), 2010 IEEE
Source: IEEE Xplore

ABSTRACT This paper presents a switching PA-based polar transmitter which achieves uniform and robust performances under process, voltage, and temperature variations. A new approach utilizing current driven envelope signal is proposed, leading to much more accurate control of output power of the PA. In addition, the proposed adaptive LO technique extends the available linear control range of the PA. Fabricated in 0.13 um CMOS process, an experimental polar transmitter is designed to fulfill the stringent requirements of the 5.8 GHz Korean DSRC/ETC standards. Delivering output power of + 12 dBm, it consumes average current of 35 mA at 3.3 V supply voltage. Output P-1dB of 15 dBm and ACPR lower than -50 dBc are obtained. The transmitter achieves output power error less than ± 1 dB over the temperature and supply voltage range from -40 to 100°C and from 3.0 to 3.6 V.

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Keywords

accurate control
 
achieves uniform
 
available linear control range
 
Delivering output power
 
Fabricated
 
GHz Korean DSRC/ETC standards
 
new approach utilizing current
 
Output P-1dB
 
output power
 
output power error
 
paper presents
 
proposed adaptive LO technique
 
robust performances
 
stringent requirements
 
supply voltage
 
supply voltage range
 
switching PA-based polar transmitter