A Polyphase Multipath Technique for Software-Defined Radio Transmitters

Shrestha, Rameswor and Klumperink, Eric A.M. and Mensink, Eisse and Wienk, Gerard J.M. and Nauta, Bram (2006) A Polyphase Multipath Technique for Software-Defined Radio Transmitters. IEEE Journal of Solid-State Circuits, 41 (12). pp. 2681-2692. ISSN 0018-9200

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Abstract:	Transmitter circuits using large signal swings and hard-switched mixers are power-efficient, but also produce unwanted harmonics and sidebands, which are commonly removed using dedicated filters. This paper presents a polyphase multipath technique to relax or eliminate filters by canceling a multitude of harmonics and sidebands. Using this technique, a wideband and flexible power upconverter with a clean output spectrum is realized in 0.13-mum CMOS, aiming at a software-defined radio application. Prototype chips operate from DC to 2.4 GHz with spurs smaller than -40 dBc up to the 17th harmonic (18-path mode) or 5th harmonic (6-path mode) of the transmit frequency, without tuning or calibration. The transmitter delivers 8 mW of power to a 100-Omega load (2.54 Vpp-diff voltage swing) and the complete chip consumes 228 mW from a 1.2-V supply. It uses no filters, but only digital circuits and mixers
Item Type:	Article
Copyright:	© 2006 IEEE
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Integrated Circuit Design (ICD)
Link to this item:	http://purl.utwente.nl/publications/58139
Official URL:	http://dx.doi.org/10.1109/JSSC.2006.884182
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