Only For Training And Service Purposes - LG GT810h Service Manual

3. TECHNICAL BRIEF
3.6.4 W-CDMA Dual-Band POWER AMPLIFIER (U106: AWT6321R)
The AWT6321 addresses the demand for increased integration in dual-band handsets for North
American CDMA network deployments. The small footprint 3 mm x 5 mm x 1 mm surface mount RoHS
compliant package contains independent RF PA paths to ensure optimal performance in both frequency
bands, while achieving a 25% PCB space savings compared with solutions requiring two single-band
PAs. The package pinout was chosen to enable handset manufacturers to easily route VCC to both
power amplifiers and simplify control with a common VMODE pin. The device is manufactured on an
advanced InGaP HBT MMIC technology offering state-of-the-art reliability, temperature stability, and
ruggedness. The AWT6321 is part of ANADIGICS' High-Efficiency-at-Low-Power (HELP™) family of
CDMA power amplifiers, which deliver low quiescent currents and significantly greater efficiency without
a costly external DAC or DC-DC converter. Through selectable bias modes, the AWT6321 achieves
optimal efficiency across different output power levels, specifically at low- and mid-range power levels
where the PA typically operates, thereby dramatically increasing handset talk-time and standby-time. Its
built-in voltage regulator eliminates the need for external switches. The 3 mm x 5 mm x 1 mm surface
mount package incorporates matching networks optimized for output power, efficiency and linearity in a
50 Ω system.
LGE Internal Use Only
[Figure 3.9] AWT6321R Functional Block Diagram.
Copyright © 2009 LG Electronics. Inc. All right reserved.
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Only for training and service purposes