Title :
Unified approach for large signal stability analysis of 4Watt UHF RF power amplifier
Author :
Subramaniam, Anbalagan ; Ain, Mohd Fadzil
Author_Institution :
Global Technol. Dev. Group, Motorola, Bayan Lepas, Malaysia
Abstract :
This paper highlights large signal stability analysis on predicting RF power amplifier (PA) circuit instabilities by calculating system´s poles and zeroes from closed loop transfer function of the circuit linearized around its steady state through a small current perturbation excitation at the node the circuit. By using this technique, the nature of amplifier oscillations can be determined, which assists in selecting a suitable strategy for circuit stabilization. The proposed methodology has been successfully applied to analyze and eliminate low frequency oscillations in the design of 4W UHF RF power amplifier.
Keywords :
UHF power amplifiers; circuit oscillations; circuit stability; closed loop systems; linear network synthesis; linearisation techniques; poles and zeros; transfer functions; UHF RF power amplifier; amplifier oscillation; circuit stabilization; closed loop transfer function; large signal stability analysis unified approach; linearized circuit; low frequency oscillation; poles and zeros; power 4 W; small current perturbation excitation; Design automation; Logic gates; Power measurement; Radio frequency; Solid modeling; Large signal stability analysis; low frequency oscillation; transfer function;
Conference_Titel :
Communication Software and Networks (ICCSN), 2011 IEEE 3rd International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-61284-485-5
DOI :
10.1109/ICCSN.2011.6014934
