Rf Power Supply Configuration - Nokia RH-6 Series Rf Description & Troubleshooting

RH-6
7 - RF Description & Troubleshooting

RF power supply configuration

All power supplies for the RH-6 RF Section are generated in the UEM IC (D200). All RF
supplies can be checked either in Mjoelner or in BB chamber.
The power supply configuration used is shown in the block diagram below. Values of
voltages are given as nominal outputs of UEM. Currents are typical values.
Note, that not all currents can be measured directly. Spots for measuring of voltages are
indicated in the above "test points" sections.
VR1A
VR2
VR3
UEM
VR4
VR5
VR6
VR7
VIO
VREF01
VBAT
Page 10
Company Confidential
4.75 V 3.2 %
0.45 mA
2.78 V 3 %
85 mA
2.78 V 3 %
3.5 mA
2.78 V 3 %
14 mA (Tx900), 28 (Rx)
2.78 V 3 %
41 mA
2.78 V 3 %
11 mA
2.78 V 3 %
14 mA
1.8 V 4.5 %
0.02 mA
1.35 V 2 %
100 uA
3.6 V
Figure 7: RF Power distribution diagram
Copyright © 2003 Nokia Corporation.
Company Confidential
CCS Technical Documentation
charge pump (VDDCP)
Tx modulator (VDDTX)
Dig. control (VDDDIG)
Ant. switch control lines
(through Mjoelner)
VCXO (VDDXO)
BB buffer (VDDBBB)
Rx BB section (VDDRXBB)
Tx buffer (through Mjoelner)
PLL prescaler (VDDPRE)
dividers, LO buffers (VDDLO)
PLL counters (VDDPLL)
Rx front end (VDDRXF)
VCO
13/26 MHz (SELADDR)
dig. interface (VDDDL)
bias reference (VBEXT)
Triple band PA
Issue 1 10/2003