Complete EDGE System for Handsets

Skyworks Solutions has introduced a complete RF subsystem for E-GPRS (GSM/GPRS/EDGE) mobile handsets. Skyworks' RF chipset solution includes the company's leadership single-chip direct conversion transceiver, power amplifier (PA) module and a PA controller/modulator. Skyworks' new subsystem utilizes the company's patent-pending Polar Loop transmit modulation technology which eliminates expensive components such as SAW filters, in order to save handset designers significant space, cost and design-cycle time with improved performance. This approach has the potential for improving PA efficiency in EDGE mode by up to 10% when compared to conventional architectures, resulting in improved talk times.

"Skyworks continues to extend its leadership in RF subsystems and PAs, with a three-chip solution that enables customers to quickly enter the rapidly emerging market for EDGE-based wireless data services," said Mohy Abdelgany, vice president of RF Systems for Skyworks. "Our innovative Polar Loop modulation technique provides significant improvements in BOM reductions and power efficiency and will give designers a powerful solution for developing next-generation E-GPRS handsets."

Skyworks' complete radio subsystem includes all the necessary RF components for building state-of-the-art quad-band (850/900/1800/1900) handsets. At the heart of the solution is the company's advanced Polar Loop transmit modulation architecture. This unique approach enables the radio to transmit both constant as well as non-constant envelope signals through the same transmit path to minimize the number of external components required to build a mobile handset. In addition, the architecture significantly reduces the complexity, size, cost and power requirements of next-generation EDGE platforms.

Skyworks' Polar Loop technology leverages saturation-mode PA technology, the industry's dominant approach for GSM terminals, to maximize power added efficiency (PAE) in EDGE modulation (8-Phase Shift Keying). This is done in an extremely robust closed-loop system. The three-chip solution enables the system to perform well under extreme Voltage Standard Wave Ratio (VSWR) conditions up to a 6:1 ratio, while not requiring the use of an external isolator. This further reduces the cost and size of the system."

Posted to the site on 22nd July 2003