Motorola EP450

11-6 UHF 403-440 MHz Schematic Diagrams, Overlays, and Parts Lists
November 24, 2003 HKLN4216A
Chapter 11 UHF 403-440 MHz Schematic Diagrams, Overlays, and Parts Lists
0.79V
4.2V
UHF R1 Front End
0.1uF
C99
R20
5.6K
R21
75
C36
1%
16pF
C20
390pF
C34
1.6%
6.2pF
15pF
1%
C1
18pF
1%
C33
C523
5.5%
0.55pF
C37
1.6%
6.2pF
L40
27nH
18pF
1%
C2
1.0%
10pF
FE_RF_INJ
C51
C12
NC
82pF
0.6pF
C524
IO3
3
IO4
4
R23
27K
NC
CR41
HSMS2829
IO1
1
2
IO2
C7
1.8pF
5.6%
C3
NU
C5
0
C26
390pF
8.2pF
IF1
1%
20pF
C29
1.2%
C11
L34
NU
C4
0
9.85nH
2%
2%
9.85nH
C8
SH40
SHIELD
1
L31
9.85nH
2%
L3
680nH
L52
1.0%
C44
10pF
BFS505
Q21
1
3
FE_IF_OUT
C35
1%
12pF
0
C48
RF BALUN
5
NC
4
6
3
2
1
T41
30pF
NU
C4
7
TP1
1
C43
1%
13pF
1%
C10
R24
1.2K
C39
1%
12pF
TP2
1
SH1
SHIELD
1
1
3
2
18nH
L55
CR1
2.4pF
C30
1%
22pF
C13
4.2%
9.1pF
1.1%
C27
NU
C46
C42
1.8pF
5.6%
C6
1.0%
10pF
390pF
C2
5
R51
390pF
10%
C21
L51
150nH
51
L2
2%
9.85nH
L32
27nH
9.85nH
2%
L33
2%
9.85nH
L41
C38
1%
16pF
2
5
63
1
4
UMT1
Q22
C32
1.3%
7.5pF
C41
15pF
1%
C28
1%
15pF
C14
L1
2.4pF
4.2%
C49
NU
9.85nH
2%
4.5%
2.2pF
390pF
C522
3.0%
C521
C23
R25
5.6K
3.3pF
T42
5
NC
4
6
3
2
1
IF BALUN
C31
1.1%
9.1pF
L21
27nH
1K
R40
C45
1%
22pF
C9
1%
18pF
FE_5R
R22
5.6K
RX_IN
IF_OUT
RX_INJ
5R
2
Figure 11-4. UHF (403-440 MHz) PCB 8486635Z03-O Receiver Front End Schematic Diagram