Figure 8-11. Nud7120A Mixer And If Filter Circuits - Motorola APX 5000 Service Manual

Schematics, Boards Overlays, and Parts Lists: Transceiver (RF) Boards: VHF
IN
C502
L501
TL_RX_B1_MIX_IN
330PF
24NH
IN
C501
2PF
DNP
DC_LIN_3V
IN
C599
100PF
TL_RX_LO
IN
DC_LIN_1_8V
T503
059248278
P1 S1
1 3
S2
2
P2 S3
6 4
5
NC
C512
C506 C508
33PF
0.1UF 1000PF
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
S1
3
S2
2
C509 C513
1000PF 100PF
S3
4
5
NC
E501
1
FL501
C523 L503
31B01
470PF
220NH
1
IN OUT
C515
6.8PF
P1
1
R502
68
P2
6
L502
C514
47NH 43PF
2
C517 R504 R506
0.1UF 3.3K 150
R503
24K
C520 L506
2 5 1000PF
Q501 Q501 150NH
BC858CD
BC858CD
R505
180K
R508
15
C518
1000PF
C521
1000PF
L505 R507
L504 150NH
2.7K
390NH
Q503
4 1
BFR380F
C524
C519
C516
27PF 18PF
2.7PF
L507
33NH

Figure 8-11. NUD7120A Mixer and IF Filter Circuits

8-13
C522 R511
TL_RX_IF_OUT
15PF
2.7
OUT
C525
3.3PF
R509
10