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Ultrasmall front-end module targets GPRS handsets

Posted: 21 Jun 2010 ?? ?Print Version ?Bookmark and Share

Keywords:front-end module? GPRS handset? amplifier? CMOS FEM?

SKY77555 front-end module

Skyworks Solutions Inc. claims the most cost-effective CMOS front-end module (FEM) GPRS handsets. The SKY77555 offers handset OEMs high-performance solutions for entry-level phones in an ultrasmall 5mm x 6mmpackage. By eliminating the need to optimize matching between the amplifier and the switch, this module helps accelerate customers' time-to-market relative to other more traditional architectures, and simplifies the supply chain for high-volume, cost-sensitive phones.

"Skyworks' CMOS and GaAs front-end modules allow handset manufacturers to create ultrasmall and low-cost GSM/GPRS solutions, as well as to select different price versus performance options from the same basic phone design," said Gregory L. Waters, Skyworks' executive VP and general manager for front-end solutions. "Our technology-agnostic approach provides our customers with a unique advantage in meeting their platform, geographic and cost needs. Looking ahead, we will continue to leverage both silicon and GaAs technology across a variety of new products, ranging from entry-phone devices to industry-leading, low-cost smart phones and 3G/4G solutions."

The SKY77555 is a transmit and receive FEM based on CMOS power amplifiers (PAs) for dual-band cellular handsets comprising GSM900 and DCS1800 operation. Designed in a low profile and compact form factor, the FEM offers a complete transmit VCO-to-antenna and antenna-to receive SAW filter solution. The device also supports Class 12 GPRS multislot operation.

The AX502 and AX508 devices integrate a full quad band GSM/GPRS PA function on a single IC using advanced 0.13?m CMOS process technology.

Patented technology in the AX502 is employed to integrate both input and output matching circuits, without the use of organic modules or costly ceramic substrates. It offers the handset designer an easy, zero-component interface to transceiver and transmit receive switch module. The device supports GPRS class 12 operation at a case temperature of up to +85C. High accuracy power control and ramping is achieved on-chip via a closed loop power control system.

Key benefits of the AX508 include improved performance, equating to longer talk time. With the AX508, Skyworks offers a small footprint by housing the PA in an ultra-low profile micro lead frame package.

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