LG GT350 - General Description; Functional Block Diagram

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Only for training and service purposes
3. TECHNICAL BRIEF
LG Electronics 52/115 LGE Property
3.16 General Description
The RF transceiver (PMB 6272 SMARTi-PM) is an integrated single chip, quad-band transceiver for
GSM850/GSM900/GSM1800/GSM1900 designed for voice and data transfer applications. The transceiver
provides an analog I/Q baseband interface and consists of a direct conversion receiver and a quad-band
polar transmitter for GSM and EDGE with integrated PGA functionality. Further on a completely integrated
SD-synthesizer with HSCSD and GPRS/EDGE capability, a digitally controlled reference oscillator with three
outputs, a fully integrated quad-band RF oscillator and a three wire bus interface with all necessary control
circuits complete the transceiver.
Figure 23 RF transceiver PMB6272 SMARTi-PM functional block diagram
PMB 6272
Revision A1.1
Confidential
Product Specification 19 Rev A1.1, 19-05-2006
2.3 Functional Block Diagram
fast
PFD
Integrated
3.8GHz VCO
Sigma-Delta
MASH Modulator
multi modulus divider
26 MHz
VCO
control
fast
CP
3-wire
bus
Sequencing
NI.NF
MOD
w

w2
OLG
adjust
Timing
&
Measure
me
nt
on chip
loop filter
DAC
cordic
I/Q
=>
R/F
d/dt
I
Q
w

w2
VCO-LDO
26
MHz
ADC
ADC
Bias
Bias DAC
A/AX
B/BX
EN
DA
CLK
XO/
XOX
FSYS1
FSYS2
FSYS3
RX1/RX1X
850MHz
RX2/RX2X
900MHz
RX3/RX3X
1800MHz
RX4/RX4X
1900MHz
TX1
850/900MHz
TX2
1800/1900MHz
VBIAS
R_
O
C
V
2
2
2
2
PGA
6dB
Dig
PGA
PGA
1dB
.125dBRamp
FEM
Control
FE1
FE2
SMARTiPM_Blockschaltbild_20060412.emf
Figure 3 Functional Block Diagram