Figure 8-59. Nuf6750A Mixer And If Filter Circuits - Motorola APX 5000 Service Manual

Schematics, Boards Overlays, and Parts Lists: Transceiver (RF) Boards: 700–800 MHz
IN
C526 C527 C503
2.7PF 2.7PF
1.5PF
IN
TL_RX_B2_MIX_IN
L508 L509
8.2NH 8.2NH
DC_LIN_3V
IN
C599
TL_RX_LO
100PF
IN
DC_LIN_1_8V
T503
059248278
C511
100PF
P1
S1
1 3
S2 2
P2 S3
6 4
5
NC
C506 C508
C512
0.1UF 1000PF 33PF
U506
1 15
GND1 MIXBIAS
2 14
INB GND4
3 13
INA
RF_M
4 12
LG2 RF_P
5 11
LG1
GND3
C507
220PF
R501
51
T504
059248278
3 S1
2 S2
C509 C513
1000PF 100PF
4 S3
5
NC
E501
1
C523 L503 FL501
31B01
470PF 220NH
1
IN OUT
C515
6.8PF
P1
1
R502
68
P2
6
L502
C514
47NH
43PF
2
C517 R504 R506
3.3K 150
0.1UF
R503
C520 L506
24K
2 5 BC858CD
150NH
1000PF
Q501
Q501
BC858CD
R505
180K
R508
15
C518
C521
1000PF 1000PF
R507
L504 C524 C519 L505
2.7K
27PF 18PF
390NH 150NH
Q503
4 1
BFR380F
C516
2.7PF
L507
33NH

Figure 8-59. NUF6750A Mixer and IF Filter Circuits

8-91
C522 R511
TL_RX_IF_OUT
15PF 2.7
OUT
C525
3.3PF
R509
10