LG KE600 - Cell Phone Service Manual page 62

Figure 35 RF transceiver PMB7262 SMARTi-PM functional block diagram
C614 C615
2.5p 2.5p
L602
18nH
1V5_RF 2V85_RF
C622
0.1u
2V85_RF
C623
0.1u
FE2
33
VBIAS
34
VDDTX1V5
35
LBAND_PAM_IN TX1
36
HBAND_PAM_IN TX2
37
VDDTX2V8
R617 10 38
VDDMIX2V8
39
GND3
40
GND4
41
C630 C631
0.1u 0.1u
Figure 36 RF transceiver PMB7262 SMARTi-PM schematic
C616 C617 C618 C619
1.5p 1.5p 1.2p 1.2p
L603 L604
6.8nH 6.8nH
1V5_RF
2V85_RF
C624 C626 C627
C625
47n
0.1u 0.1u 0.1u
VDDRX2V8
20
VDDRX1V5
U602
19 R616 820
VCO_RC
PMB6272
18
VDDVCO2V8
17
EN
16
VDDXO2V8
15
FSYS1
14
GND1
13
2V7_VCXO
VCC
4
C641 C632
NA OUT
1u
3
C633 100p R620 0
2V85_RF
1V5_CORE
R622 10
C636
C637
0.1u
0.1u
- 63 -
3. TECHNICAL BRIEF
2V7_VCXO
R615
0
C628
0.1u
C629 1000p
26MHz
GND
2
R619 680
VCONT
1
X601
C634
22p
C635 1000p
RF_EN
26MHZ_MCLK
AFC
BT_CLK
RF_CLK
RF_DA
QX
Q
IX
I