Characterization and optimization of pulse drivers for switched mode power amplifier measurements

This paper focuses on the evaluation of pulse drivers for the use in class-S power amplifier setups with respect to linearity. Nonlinear effects are likely to degrade the overall system performance, though they are hard to characterize especially in an early stage of design. Based on measurements conducted with a configurable pulse driver, namely Triquint's TGA4954-SL, a simple gauging method was developed. It allows the identification of favorable bias-parameter settings or the comparison of different devices while requiring only very little knowledge of the overall system.

[1]  Zoya Popovic,et al.  Circuit Approaches to Nonlinear-ISI Mitigation in Noise-Shaped Bandpass D/A Conversion , 2010, IEEE Transactions on Circuits and Systems I: Regular Papers.

[2]  Oliver M. Collins,et al.  Measurement and Reduction of ISI in High-Dynamic-Range 1-bit Signal Generation , 2008, IEEE Transactions on Circuits and Systems I: Regular Papers.

[3]  Nuno Borges Carvalho,et al.  Designing Harmonic-Controlled Drivers for Switching Power Amplifiers , 2013, IEEE Transactions on Circuits and Systems II: Express Briefs.

[4]  O. Ambacher,et al.  Broadband GaN-Based Switch-Mode Core MMICs with 20 W Output Power Operating at UHF , 2011, 2011 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS).

[5]  Henri Ruotsalainen,et al.  A New Quadrature PWM Modulator With Tunable Center Frequency for Digital RF Transmitters , 2012, IEEE Transactions on Circuits and Systems II: Express Briefs.