Test Circuit B: Test Circuit Board Layout @ 836.5 MHz for CW Operation (AMPS)
VBB
VCC
38.1 (1.5)
VBB
T1
C2
R2
L1
R1
R3
C4
R4
C1
C3
INPUT
PA1 DEMO
C6
L2
R5
C5
VCC
C7 C8
9/96
B–MFG0139
C9 C10
OUTPUT
C1
100.0 pF
C2
100.0 nF
C3
11.0 pF
C4
100.0 pF
C5
100.0 pF
C6
100.0 nF
C7
1.5 µF
C8
10.0 µF
C9
4.7 pF
C10 100.0 pF
R1
10.0 Ω
R2
619.0 Ω
R3
10.0 Ω
R4
40.0 Ω
R5
10.0 Ω
T1 MBT 2222A
L1
18.0 µH
L2
18.0 µH
76.2 (3.0)
CW Test
VCE = 4.8 V
ICQ = 15 mA
Freq. = 836.5 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 B: Test Circuit Schematic Diagram @ 836.5 MHz for CW Operation (AMPS)
10 Ω
VBB
619 Ω
CW Test
VCC
VCE = 4.8 V
ICQ = 15 mA
Freq. = 836.5 MHz
B DC
100 nF
C E Transistor
10 Ω
10 Ω
100 pF
18 µH
80 Ω
λ/4 @ 836.5 MHz
100 pF
80 Ω
100 nF
18 µH
λ/4 @ 836.5 MHz
1.5 µF
10 µF
RF IN
100 pF
11.0 pF
40 Ω
50 Ω
= 9.02 (.355)
50 Ω
= 32.66 (1.286)
100 pF
4.7 pF
RF OUT
4-97