User Guide

NPM-10 (3595)
System Module CC Technical Documentation
Page 40 ©2004 Nokia Corporation Confidential Issue 2 03/2004
Power Distribution Diagram
Figure 12: Power Distribution
Frequency Synthesizers
VCXO
The VCXO is an on-chip oscillator with off-chip crystal. The oscillator in itself is balanced
with two independent outputs. One output is used inside the ASIC as reference for the
PLL. The second output is for the baseband, an output that can be filtered inside the
ASIC, controlled by SW. The reference for the BB is SW selectable to be either 13 MHz or
26 MHz. The reference frequency for NPM-10 (3595) will be 26 MHz in order to ease the
suppression of the reference spurious.
The drive level of the crystal can be adjusted by software control; the frequency accuracy
is controlled by software with digital frequency inputs. The digital frequency control is
divided between calibration and AFC.
VCO
The VCO is the module with the frequency determining parts inside. The output of the
VCO is a frequency in the range of 3420 MHz - 3840MHz.
VR2
VR3
VR5
VR6
VR7
VIO
Vref01
Battery
UEM
PA
Vtx
VddTX
MJOELNER
VXO
VddXO
VPLL
VddLO
VddPre
VddPLL
Vrx
VddRXF
VddRXBB
Vvco
Vref1
Vbext
Vbb
VddDL
Sel_addr
VCO
module
Vdddig
Vddbbb
VR1A
VddCP
VCP