LG GD510 Service Manual

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Only for training and service purposes

LGE Internal Use Only

3. Technical brief

GD510 Operational Description Revision A

LG Electronics 51/113 LGE Property

3.22. Power Amplifier Module

The TQM7M5005H Power Amplifier Module(PAM) is designed in a compact from fact for quad-band

cellular handsets comprising GSM850/900,DCS1800,PCS1900,supporting GMSK and linear EDGE

modulation. Class12 General Packet Radio Service(GPRS) multi-slot operation is also supported.

The module consists of a GSM850/900 PA block and a DCS1800/PCS1900 PA block,impedance

matching circuitry for 50ohm input and output impedances, and a Multi-function Power Amplifier

Control(MFC) block. A custom CMOS integrated circuit provides the internal MFC function and interface

circuitry.

Two separate Heterojunction Bipolar Transistor(HBT) PA blocks are fabricated onto InGaP die; one

supports the GSM850/900 bands, the other supports the DCS1800 and PCS1900 bands. Both PA

blocks share common power supply pins to distribute current. The InGaP die, the silicon die, nad the

passive components are mounted on a multi layer laminate substrate. The assembly is encapsulated

with plastic overmold.

RF input and output ports are internally matched to 50ohm to reduce the number of external components

Extremely low leakage current(2.5uA) maximizes handset standby time. Band select(BS) circuitry select

GSM transmit frequency band(logic0) and DCS/PCS transmit frequency(logic1). MODE circuitry selects

GMSK modulation (logic0) or EDGE modulation(logic1). VRAMP controls the output power for GMSK

modulation and provides bias optimization for EDGE modulation depending on the state of MODE

control.

The integrated multi-function(MFC) provides envelope amplitude control in GMSK mode, reducing

sensitivity to input drive, temp, power supply, and process variation. In EDGE mode, the MFC configures

the PA for fixed gain, and provides the ability to optimize the PA bias operation at different power levels,

This circuitry regulates PA bias conditions, reducing sensitivity to temp., power supply, and process

variation. The Enable input signal(pin8) provides a standby state to minimize battery drain..

.Table 10 PAM pin description

Other manuals for LG GD510

General

Display type	TFT
Display diagonal	3 \
External display	No
Display resolution	240 x 400 pixels
Display number of colors	262144 colors
Internal memory	40 MB
Compatible memory cards	MicroSD (TransFlash)
Maximum memory card size	8 GB
Digital zoom	4 x
Rear camera resolution	2048 x 1536 pixels
Rear camera resolution (numeric)	3 MP
Multimedia Messaging Service (MMS)	Multimedia Messaging Service (MMS) is a standard way to send messages that include multimedia content to and from a mobile phone over a cellular network
Ringer type	Polyphonic
Polyphonic rings quantity	64
Type	Feature phone
Product color	Silver
Talk time (2G)	3.3 h
Battery capacity	900 mAh
Standby time (2G)	360 h
Form factor	Bar
Phonebook capacity	1000 entries
Text prediction system type	T9
Personal info management (PIM)	Alarm clock, Calculator, Calendar, Notes, To-do list
Bluetooth version	2.1+EDR
Bluetooth profiles	A2DP
WAP	2.0
Data network	EDGE, GPRS
SIM card capability	Single SIM
Video call	-
Subscription type	No subscription
Specific absorption rate (SAR) value (EU)	- W/kg