Figure 8-124.Receiver Front End Circuit - Motorola APX 1000 Detailed Service Manual

Schematics, Boards Overlays, and Parts Lists: Transceiver (RF) Boards: 700 – 800 MHz (84012266001 / PC000351A01)
IF401M20
1 IF
IN
CTRL_RX_78_LNA_A = 3V (HIGH), LNA'S TURN ON
IF402M20
1 IF
IN
CTRL_RX_78_SW2
C402M20
TL_RX_78 33PF
IF RF_RX_78_SW1
1
IN
IF403M20
C404M20
33PF
CTRL_RX_78_SW2
RF_RX_78_SW3
C405M20
33PF
IF405M20
1 IF
IN
DC_LIN_3V
VCC VCC
U408M20
NC7WZ04
GND GND
3
CTRL_RX_78_SW2
U408M20
IF404M20
NC7WZ04
IF
1 1 6
IN
CTRL_RX_78_SW1
DC_LIN_1_8V_A
Q401M20
MUN5212T
22K
CTRL_RX_78_LNA_A 1
CTRL_RX_78_SW2 = 0V, 800 PATH SELECTED
CTRL_RX_78_SW1 = 0V, 700 PATH SELECTED
SW1 AND SW2 HAVE TO BE OPPOSITE
L407M20
7.5NH
RF_RX_8_F1OUT
RF_RX_8_SW1
RF_RX_8_F1IN RF_RX_8_SW2
R450M20
C412M20
4 3
0 9.1PF
V1 J2
FL401M20
5 2 1 B4232 7
J1 GND IN1 OUT1
3 5
IN2 OUT2
6 1
V2 J3
C413M20
47PF
U402M20
R451M20
AS211334
RF_RX_7_SW2
0
CTRL_RX_78_SW1
RF_RX_7_F1OUT CTRL_RX_78_SW1
C406M20
33PF L408M20
10NH
RF_RX_8_SW4
RF_RX_8_F2IN
R454M20
RF_RX_8_F2OUT
RF_RX_8_SW3
R452M20 0
4 3 0
0613952R66
FL402M20
5 2 1 B4232 7
IN1 OUT1 OUT1
3 5
IN2 OUT2 OUT2
6 1
R453M20
0
U403M20 RF_RX_7_SW3
R455M20
AS211334
RF_RX_7_F2OUT
0
CTRL_RX_78_SW1
RF_RX_7_F2IN
C407M20
33PF
U408M20
NC7WZ04
4
NC
E401M20
DC_RX_78_LNA_A
1 2
R403M20
R404M20
3.3K
68
R401M20
22K
DC_RX_78_LNA_D
3
DC_RX_78_LNA_C
Q402M20 BC858CD
5 2
BC858CD
Q402M20
R402M20
82K
DC_RX_78_LNA_B
CTRL_RX_78_LNA_B
DC_RX_78_LNA_E
C421M20
4.7UF
L402M20
C422M20
12NH
33PF
RF_RX_78_LNA1_C
L401M20
U404M20
10NH
AS211334
RF_RX_78_LNA1_B
C425M20
1 6
CTRL_RX_78_SW2 8.2PF
J3 J3 V2 V2
C487M20
RF_RX_78_SW2 U406M20
2 5 1
BFR380F
GND GND J1 J1
30PF
33PF
3 4 C423M20
RF_RX_78_LNA1_E
J2 J2 V1 V1
C484M20
1PF
L403M20
3.3NH
C416M20 R447M20
33PF 10
CTRL_RX_78_SW2
U405M20
AS211334
1 6 RF_RX_78_LNA2_B
J3 J3 V2 V2
RF_RX_78_LNA2_A
2 5
GND GND J1 J1
3 4
J2 J2 V1 V1
RF_RX_78_LNA2_E
C485M20
RF_RX_7_SW4
1PF
CTRL_RX_78_SW1
C419M20 R448M20
C417M20
33PF 10
33PF
C427M20
4.7UF
R413M20
2.7
RF_RX_78_LNA1_A
E402M20
DC_RX_78_LNA_F
1 2
R406M20
0
C426M20
1PF
R409M20 R410M20
DC_RX_78_LNA_G
68
3.3K
RF_RX_78_LNA1_F
R407M20
22K
R405M20
10
Q403M20
2 5
BC858CD
R408M20
R456M20
82K
0
DC_RX_78_LNA_I
0613952R23
DC_RX_78_LNA_J
C428M20 C429M20
4.7UF 33PF
RF_RX_78_LNA2_F
L405M20
10NH
RF_RX_78_LNA2_C
L404M20
15NH
C488M20
R412M20
C432M20
2.7PF
5.1
C430M20 5.1PF
L489M20
C433M20
30PF
U407M20
1 1PF 8.2NH
BFR380F
RF_RX_78_LNA2_D
R411M20
10
L406M20
2.4NH
R457M20
0
Figure 8-124. Receiver Front End Circuit
8-269
DC_RX_78_LNA_H
C431M20 C434M20
33PF 4.7UF
C490M20 C492M20
IF406M20
1.5PF 2.7PF
IF
1
OUT
RF_RX_FE_B2_OUT
L491M20
8.2NH