LG GW620 - Calls; Making a call; Calling your contacts; Answering and rejecting a call

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Only for training and service purposes

LGE Internal Use Only

3. Technical Brief

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3.7 GPS/WIFI/BT OFF-CHIP RF COMPONENTS

3.7.1 A-GPS (ALM-2412)

The ALM-2412 is a LNA with integrated filter designed for GPS band applications at 1.575GHz. The LNA uses

AVAGO Technologies’ proprietary GaAs Enhancement-mode pHEMT process to achieve high gain operation

with very low noise figures and high linearity. Noise figure distribution is very tightly controlled. A CMOS-

compatible shutdown pin is included to turn the LNA off and provide a variable bias. The integrated filter

utilizes an Avago Technologies’ leading edge FBAR filter for exceptional rejection at Cell/PCS Band

frequencies. The ALM-2412 is useable down to 1V operation. It achieves low noise figure and high gain and

linearity even at 1V, making it suitable for use in critical low-power GPS applications or during low-battery

situations.

3.7.2 WLAN/Bluetooth (LBEH19UNBC)

The GW620 device provides the highest level of integration for a mobile wireless system, with integrated

IEEE802.11 b/g (MAC/baseband/radio), Bluetooth 2.1. The LBEH19UNBC that is included of BCM4325 solution

is supported three kinds of functions. It is the one antenna structure which is supported of WLAN/Bluetooth

in 2.4GHz band.

<WLAN>

The GW620 supports single-band 2.4GHz IEEE802.11b/g standardization. The WLAN module which is

consisted of the BCM4325 single chip device provides for the highest level of integration for a mobile or

handheld wireless system, with integrated IEEE802.11TM b/g (MAC/baseband/radio). The BCM4325’s

integrated CMOS WLAN 2.4GHz power amplifier provides sufficient output power to meet the need of most

WLAN devices. The interface between MSM7200A and WLAN module is the standard interfaces SDIO v1.2 (4-

bit and 1-bit). Figure1.10 shows the WLAN system architecture in the GW620.

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