
43
Power amPlifiers in wireless CommuniCations
AAB
B
min
I
max
V
min
Voltage V
V
DC
V
DC
V
DC
R
CB
A
–180 –90
0
90 180
+
L
V
max
I
max
– I
C
Figure 3.14 Schematic and current waveform of classes A, B, AB, and C.
Co
RFC
–Vdd
+
–
Lo
L3
C3
C4
M1
Figure 3.15 Single-ended power amplifier (class F). (From Pinal, P. L. G. 2007. Multi look-up
table digital predistortion for RF power amplifier linearization. Department of Signal Theory and
Communications, Universitat Politecnica de Catalunya, Barcelona, Spain. With permission.)