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UMTS transmit system rolls for multiregion 3G handsets

Posted: 20 Feb 2007 ?? ?Print Version ?Bookmark and Share

Keywords:UMTS? 3G? transmit system? RFMD? UMTS system?

RF Micro Devices Inc. (RFMD) has released its RF628x family of products that provides a UMTS transmit system for the implementation of multiregion, multimode 3G handset platforms.

Comprised of the RF6280, RF6281 and RF6285 devices, this UMTS transmit system supports all major UMTS frequency bands and provides a single platform that supports multiple UMTS regions by simply changing filter components. No changes to the phone board's RF layout are required.

The transmit system features a dedicated single-band power amplifier module (supporting Band I), a flexible dual-band power amplifier module (capable of supporting Bands I, II, III, IV, V, VI, VIII, IX) and a low-noise, high efficiency DC/DC converter/controller. The compact design of the RF628x transmit system enables a greater than 30 percent reduction in the implementation of tri-band UMTS solutions including filtering, as compared to competitive solutions, according to the company.

In addition, by leveraging a balanced PA architecture, the transmit system is also said to provide improved total radiated power (TRP) and specific absorption rate (SAR) performance, which eliminates the need for costly RF isolators and also simplifies platform implementation. It also provides high efficiency by using an analog bias control and the RF6280 DC/DC converter/controller, which maximize efficiency across all power levels and data rates (voice-only to HSPA). This helps to extend talk time and reduces thermal dissipation.

The RF6280, RF6281 and RF6285 all comply with the RoHS directive.

Sampling will start Q3 2007.

- Gina Roos

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