Linearity Of The JFET And MOSFET When In Saturation Over The Entire Cycle
Source: Quantic PMI
Dr. Alfred Grayzel, Member, IEEE
Performing RF amplification in a way that is simultaneously linear and efficient has been a challenge in power amplifier (PA) design. Single transistor PAs can either be operated in a linear, but inefficient, current source mode of operation or as efficient, but nonlinear, switches. These techniques use two FETs, but this paper demonstrates that linear amplification can be achieved at high power with an efficiency greater than 60%, using a single FET.
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