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EPC – EFFICIENT POWER CONVERSION CORPORATION |
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| COPYRIGHT 2017 | | 5
Demonstration System EPC9058
Figure 4: Class-E amplifier design process with equations.
Figure 5: Proper connection and measurement setup for the amplifier board.
V
IN
supply
(note polarity)
Output 1 pad
L
e1
C
Sh1
C
Sh2
L
e2
External oscillator
Out A oscilloscope probe
Ground post
Single supply jumper
RF Choke 2
+
7 V - 12 V
DC
+
0 V - 20 V
DCmax
V
Logic
supply
(note polarity)
Out B oscilloscope probe
Ground pad output
Output 2 pad
RF choke 1
32 π f
V
DD
L
RFck
L
e
C
sh
C
S
Z
Load
Q
1
Capacitance
Voltage
C
OSSQ
C
OSS
C
OSSQ
=
C
OSS
(V
DS
)
dv
DS
1
V
DD
V
DD
0
1
5
2
3
4
4
7
6
DC Block
R
Load
C
OSSQ
+ C
sh
=
R
Load
P
Load
(π
2
+ 4)
R
Load
1
2
3
4
8
(π
2
+ 4)
4 f
R
Load
π (π
2
4)
f R
Load
π
2
(π
2
+ 4)
V
DD
=
L
RFck
L
e
=
>
4
5
6
7
