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GSM/GPRS transmit module eyes emerging markets

Posted: 21 Feb 2008 ?? ?Print Version ?Bookmark and Share

Keywords:GSM? GPRS? transmit module? low-cost handsets?

RF Micro Devices Inc. (RFMD) has announced the RF4180 PowerStar dual-band GSM/GPRS transmit module. The RF4180 is designed to reduce front end complexity and address the price and performance requirements of today's emerging-market handsets.

The new device leverages RFMD's power control capabilities to deliver reduced solution size, simplified transmitter design, best-in-class harmonics and ease of implementation. The RF4180 is a dual-band transmit module featuring two symmetrical receive ports, 50 matched input and output ports and GSM/GPRS Class 12 compliance. The transmit module, which is designed for use as the final portion of transmit sections in GSM900/DCS1800 handsets, minimizes the requirement for PA-to-antenna matching. When mated with leading cellular baseband SoC solutions, the RF4180 delivers a highly integrated radio solution capable of accelerating time-to-market cost-effectively.

The RF4180 PowerStar transmit module combines RFMD's patented PowerStar integrated power control technology enhanced with the addition of power flattening technology and integrated Vbatt tracking to provide a complete power control system. The company's automatic Vbatt tracking circuit monitors battery voltage and prevents the power control loop from reaching saturation, thereby preserving handset switching spectrum at low battery voltages. The power flattening circuitry reduces current and power variation into non-ideal loads (also known as "antenna mismatch"), resulting in shorter handset development time and more robust handset performance. The RF4180 includes an ESD filter to provide ESD protection at the antenna port and is designed to minimize loss, providing maximum efficiency at rated output power (Pout).

Paul Augustine, general manager of RFMD's components solutions business unit, said, "The RF4180 provides handset manufacturers high efficiency and improved performance in a cost-competitive, reduced size transmit module architecture. This results in improved battery life and talk time as well as reduced thermal dissipation, all of which are key metrics in the development of emerging market handsets. RFMD will continue to focus on solving our customers' complex RF challenges, as we introduce additional innovative architectures and design techniques that lower costs, ease implementation, reduce size and accelerate time-to-market."

The RF4180 is Pb-free and complies fully with the RoHS directive. The device is currently available for $1.12 in quantities of 1 million pieces.

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