Nokia 7270 Service Manual
Issue 2 03/2005
COMPANY CONFIDENTIAL
50
Copyright © 2005 Nokia. All Rights Reserved.
RM-8/RM-47/RM-48
Nokia Customer Care
RF Power Supply Configuration
Figure 7:
VR1
4.75 V [ 4.6V ... 4.9V ]
charge pump (VCP)
Tx modulator (Vcc_ModOut)
2.78 V [ 2.70V ... 2.86V ]
VCTCXO (+VCC)
digital interface (VDIG)
VR4
VR3
VR2
PLL prescaler (VPRE)
VR5
phasing dividers of Rx (VLO)
BB buffer (VDIG)
VR6
Rx Front End (VRF_RX)
16 mA [max. 20 mA]
VCO (VCC_VCO)
VR7
UEM
Triple band PA
VBAT
100 uA
bias reference (VB_EXT)
V
refRF01
TX buffer & EDGE ALCs (VRF_TX)
Bias & Rx CH filters (VF_RX)
2.78 V [ 2.70V ... 2.86V ]
RF controls (VPAB_VLNA)
2.78 V [ 2.70V ... 2.86V ]
100 uA
bias reference
(RXIINN, RXQINN)
V
refRF02
2.78 V [ 2.70V ... 2.86V ]
2.78 V [ 2.70V ... 2.86V ]
2.78 V [ 2.70V ... 2.86V ]
2.7 V [ 2.95V ... 4.7V ]
1.35 V [ 1.32V ... 1.38V ]
1.35 V [ 1.32V ... 1.38V ]
3.7