Paper Info
Title
I/Q-Sharing Switched- Capacitor Power Amplifier With Baseband Harmonic-Rejection And Wilkinson Combiner
Abstract
The CMOS switched-capacitor power amplifier (SCPA) proposed in 2011 [1]-[2] achieved much higher system efficiency than conventional transmitter architectures. In this paper, SCPA linearity is also analyzed and improved with new techniques. Specifically, a baseband harmonic-rejection (BBHR) technique is used to minimize the counter third-order intermodulation products (C-IM3). Also, using a Wilkinson combiner, the cross-coupling between two sub-SCPAs is isolated to enable a linear harmonic-rejection summation. With the proposed topology, the linearity is improved significantly compared to a conventional I/Q-sharing SCPA. More specifically, the C-IM3 is reduced by similar to 25 dB with a single-tone input and by similar to 22 dB with modulated signal.
Year
DOI
Venue
2021
10.1109/ISCAS51556.2021.9401455
2021 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS)
Keywords
DocType
ISSN
Switched-capacitor power amplifier (SCPA), digital transmitter, baseband harmonic-rejection (BBHR), Wilkinson combiner, counter third-order intermodulation products (C-IM3), switched-capacitor circuits
Conference
0271-4302
Citations 
PageRank 
References 
0
0.34
0
Authors
4
Name
Order
Citations
PageRank
Bo Qiao1186.11
Ajmal Vadakkan Kayyil201.69
Jeffrey S. Walling316319.89
David J. Allstot402.70