Title :
Prediction of PA Optimum Load by Small Signal Parameters
Author :
Colantonio, Paolo ; Giannini, Franco ; Limiti, Ernesto ; Ticconi, Augusto
Author_Institution :
Dept. of Electron. Eng., Roma Tor Vergata Univ.
Abstract :
In this contribution an alternative viewpoint for class A power amplifier (PA) optimum load analysis is provided. The approach is based on the representation of a non linear device by its linear equivalent circuit and on precise hypothesis on the output controlled current source, in order to reproduce the limitations due to the device non linear behaviour. Exact calculations have been carried out and closed form expressions have been derived, for output power optimisation and power-added efficiency optimisation. The theoretical results are compared to the real behaviour of a non linear device, demonstrating the effectiveness of the approach
Keywords :
equivalent circuits; integrated circuit design; power amplifiers; class A power amplifier optimum load analysis; linear equivalent circuit; nonlinear device; output controlled current source; output power optimisation; power-added efficiency optimization; small signal parameters; Breakdown voltage; Capacitors; Equivalent circuits; Feedback; Knee; Performance evaluation; Power amplifiers; Power generation; Signal analysis; Transconductance; Class A; linear equivalent circuit; optimisation; optimum load;
Conference_Titel :
Integrated Nonlinear Microwave and Millimeter-Wave Circuits, 2006 International Workshop on
Conference_Location :
Aveiro
Print_ISBN :
0-7803-9723-1
Electronic_ISBN :
0-7803-9723-1
DOI :
10.1109/INMMIC.2006.283542
