13 Mhz Clock; Switchplexer For Triband - LG P7200 Service Manual

3. TECHNICAL BRIEF
3.2 13 MHz Clock (VCTCXO, X601)
The 13 MHz clock(X601) consists of a TCXO(Temperature Compensated Crystal Oscillator) which
oscillates at a frequency of 13 MHz. It is used within the SKY74400, analog base band chipset (U101,
AD6535), digital base band chipset (U103, AD6527B).
3.3 Switchplexer for Triband(FL601)
EGSM-Tx
EGSM-Rx
DCS/PCS-Tx
DCS-Rx
PCS-Rx
2V75_VVCXO
X601
3 1
OUT VCONT
4 2
VCC GND
13MHz
C605
2.2u
Figure 3-3 VCTCXO CIRCUIT DIAGRAM
Vc1 Vc2
0.0-0.1V 0.0-0.1V
0.0-0.1V 0.0-0.1V
0.0-0.1V 2.3-3.0V
0.0-0.1V 0.0-0.1V
2.3-3.0V 0.0-0.1V
Table 3-1 FEM CONTROL LOGIC
- 22 -
R606
12K
C604
1000p
Vc3
2.3-3.0V
0.0-0.1V
0.0-0.1V
0.0-0.1V
0.0-0.1V
AFC
Current
10mA Max
≈ 0mA
10mA Max
≈ 0mA
10mA Max