2.6 Energy Parameters of Class A RF Power Amplifier

2.6.1 Drain Efficiency of Class A RF Power Amplifier

The operating point (the bias point) c02-math-0438 of the Class A RF power amplifier should be selected at the midpoint of the linear region of the transistor, where

2.98 equation

and

2.99 equation

The dc supply current of the Class A RF power amplifier is

2.100 equation

The dc resistance seen by the power supply c02-math-0442 is

2.101 equation

The dc supply power (or the dc input power) in the Class A RF power amplifier is given by

2.102 equation

The dc supply power is constant and independent of the amplitude of the output voltage c02-math-0445. The power delivered by the MOSFET to the output RF load at is given by

2.103

For , the drain power reaches its maximum ...

Get RF Power Amplifier, 2nd Edition now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.