Test Circuit A: Test Circuit Board Layout @ 900 MHz
V
BB
V
BB
R2
R1
T1
R3
C2
C3
L1
R4
L2
R5
C6
C5
C8 C9
9/96
V
CC
V
CC
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
R1
R2
R3
R4
R5
T1
L1
L2
100.0 pF
100.0 pF
100.0 nF
6.8 pF
100.0 nF
100.0 pF
2.7 pF
1.5
µF
10.0
µF
100.0 pF
2.2
Ω
750.0
Ω
2.2
Ω
10.0
Ω
10.0
Ω
MBT 2222A
18.0
µH
18.0
µH
38.1 (1.5)
C1
C4
C7
C10
INPUT
PA3 DEMO
76.2 (3.0)
B–MFG0141
OUTPUT
CW Test
V
CE
= 4.8 V
I
CQ
= 5.0 mA
Freq. = 900 MHz
Test Circuit:
FR-4 Microstrip, glass epoxy board
Dielectric Constant = 4.5
Thickness = 0.79 (.031)
NOTE:
Dimensions are shown in millimeters (inches).
Test Circuit A: Test Circuit Schematic Diagram @ 900 MHz
V
BB
CW Test
V
CE
= 4.8 V
I
CQ
= 5.0 mA
Freq. = 900 MHz
V
CC
2.2
Ω
DC
C E Transistor
B
750
Ω
2.2
Ω
10
Ω
100 nF
10
Ω
100 pF
80
Ω
λ/4
@ 900 MHz
100 pF
80
Ω
λ/4
@ 900 MHz
50
Ω
100 pF
RF OUT
= 19.91 (.784)
2.7 pF
100 nF
1.5
µF
10
µF
18
µH
18
µH
100 pF
RF IN
6.8 pF
50
Ω
= 5.38 (.212)
4-49
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