A Design of 2.6 GHz Auto-Biasing Cascode Class-E PA with Vdd/AM and Vdd /PM Compensations in EER System
Circuits, Communications and Systems, Pacific-Asia Conference on (2009)
May 16, 2009 to May 17, 2009
An auto-biasing cascode class-E PA which can compensate the Vdd/AM and Vdd/PM distortion resulting from supply modulation has been proposed. The output voltage of auto-biasing control circuit is generated and varied linearly with PA’s supply voltage so that the cascode transistor is degenerated into a resistance and the PA’s nonlinear distortion can be compensated. The simulation result shows that the distortion is compensated evidently and the system co-simulation demonstrated that system EVM can be improved from -17 to -19dB. Also, the drain efficiency of the PA can be improved 15% within small supply voltage range.
transmitters, class-E power amplifier, envelope elimination and restoration (EER)
W. Wuen, W. Tsou and K. Wen, "A Design of 2.6 GHz Auto-Biasing Cascode Class-E PA with Vdd/AM and Vdd /PM Compensations in EER System," 2009 Pacific-Asia Conference on Circuits, Communications and Systems (PACCS 2009)(PACCS), Chengdu, 2009, pp. 47-50.