Only For Training And Service Purposes - LG KP270 Service Manual

SMARTiPM features a direct conversion receiver and a quad-band polar modulator transmitter forGSM
and EDGE. An analog I/Q baseband interface is provided. The HSCSD and GPRS/EDGE capable
synthesizer is fully integrated, including all RF oscillators. A reference oscillator buffer amplifier with
three outputs is provided to simplify clock distribution. A three wire bus interface is used for control and
programming. SMARTi3G is a triple-band W-CDMA transceiver for voice and high speed data
applications. SMARTi3G features a direct conversion receiver and a direct modulation transmitter.
Analog I/Q baseband interfaces are supported. A three wire bus interface is provided for control and
programming. A second three wire bus may optionally be used for fast control of the receiver
programmable gain amplifier. Fractional-N PLL RF synthesizers including separate TX and RX VCOs
are fully integrated. Programmable logic outputs are provided to control external low noise amplifiers,
power amplifiers, and antenna switches. To avoid interference between the 2.5G and 3G transceivers,
simultaneous operation of SMARTiPM and SMARTi3G is not permitted.
Copyright © 2008 LG Electronics. Inc. All right reserved.

Only for training and service purposes

SMARTi 3G
1.71...2.95V Supply
Internal
1.5V
1.5V Supply
LDO
2.7...2.95V Supply
I
RXI/RXIX
Q
RXQ/RXQX
ENPGC
DATAPGC
CLKPGC Frac-PLL
3-wire bus
RX PGC
LF VCO
FSYSIN_3G
FSYS
LF
VCO
EN / DATA / CLK
3-wire bus
Frac-PLL
TXI/TXIX
TXQ/TXQX
MASTERON
LD
TXHSMODE
TXEN
TX gain
control
TXGC
SMARTi PM
I/IX
2
Q/QX
2
Bias
3W bus
sequencing
EN_PM
DATA_PM
CLK_PM
NI.NF
Q
d/dt
ADC MOD
cordic
2
I/Q
Sigma-Delta
=>
MASH Modulator
I
R/
ADC
2
Dig
PGA
FSYSIN_P M
Ramp .125dB
26 M Hz
fast fast
CP PFD
FSYSOUT1
multi modulus divider
FSYSOUT2 Timing
&
Measure VCO
OLG
FSYSOUT3 adjust ment control
on chip
loop filter
3.8GHz V CO
1.4...1.6V Supply 2.7...2.95V Supply
[Figure 3.16-2] RF Functional Block Diagram
3. TECHNICAL BRIEF
RXINL/RXINLX
0 o 869-894 (band V/VI)
:4
90 o
RXINH/RXINHX
2110-2170 MHz (band I)
0 o
:2
90 o RXINM/RXINMX
1930-1990 MHz (band II/III)
0 o
:2
90 o
0 o
:2
90 o
0 o
:4
90 o

4
2
PGA
1dB
DAC

PGA
4
6dB
2
Bias DAC
V CO-LDO
Integrated
VCO_RC
- 53 -
RXBAND1
RXBAND2
RXBAND3
TXOUTM/TXOUTMX
1850-1910 MHz
(band II/III)
TXOUTH/TXOUTHX
1920-1980 MHz
(band I)
TXOUTL/TXOUTLX
824-849 (band V/VI)
TXBAND1
TXBAND2
TXBAND3
RX1/RX1X 850MHz
RX2/RX2X 900MHz
RX3/RX3X 1800MHz
RX4/RX4X 1900MHz
TX1 850/900MHz
TX2 1800/1900MHz
VBIAS
LGE Internal Use Only