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RF transceiver cuts need for SAW filters in handsets

Posted: 09 Jun 2010 ?? ?Print Version ?Bookmark and Share

Keywords:3G? LTE? RF transceiver? SAW filter?

MB86L10A RF transceiver

Fujitsu Microelectronics America Inc. claims that the MB86L10A is the first transceiver that supports 3GPP LTE/W-CDMA/EGPRS wireless phones. The Fujitsu MB86L10A transceiver eliminates 3G and LTE TX and RX interstage SAW filters and LNAs.

The single-chip transceiver features backward compatibility with a high-level programming model (API) for radio control using DigRF/MIPI D3G and D4G open standard digital interfaces. This makes the MB86L10A compatible with a wide range of industry base bands.

The company claims the module enables cell phone manufacturers to reduce component count, board space and total BOM. Its simplified programming model significantly reduces development time and simplifies integration of the RF in a radio platform. The transceiver, optimized for compressed mode operation, features quad-band GSM/Edge and up to five W-CDMA or LTE bands in a single-phone configuration.

The MB86L10A includes eight outputs that drive the power amplifier, eliminating the need for TX SAW filters while simultaneously supporting multi-mode PAs. The receiver provides nine inputs that support LTE, W-CDMA and GSM/Edge. The RF frontend eliminates the need for LNAs and SAW filters. Five additional ports enable RX diversity in W-CDMA and LTE modes. The receiver also incorporates anti-aliasing filters, digital channel filters, digital gain control and high-dynamic-range ADCs.

The MB86L10A supports GSM (GSM850, EGSM900, DCS1800, PCS1900), W-CDMA (Bands I, II, III, IV, V, VI, VIII, IX, X and XI) and LTE (FDD Bands 1, 3, 4, 6, 7, 8, 9, 10, 11, 13, 17 and TDD band 38 or 40). The transceiver includes dual 3G and 4G DigRF interfaces to the base band IC, SPI and/or GPO control PAs, switching regulators and antenna switches. A microcontroller in the transceiver simplifies timing and control.

"The Fujitsu MB86L10A LTE multimode transceiver is the first of its kind to eliminate LNAs and 3G/4G TX and RX SAWs, reducing board area, component count and cost," said Vivek Bhan, senior director of RF engineering and product development for Fujitsu Microelectronics America. "This LTE multi-mode RF transceiver supports most global band configurations and standard interfaces, and its simple RF API programming reduces radio integration time. The result is smaller radios with optimal time to market for handset manufacturers worldwide."

The MB86L10A is in pre-production phase and is supporting field trials at a major carrier. "The early feedback on an advanced new standard will help develop a stable product faster, speeding time to market," added Bhan.

Samples manufactured in 90nm CMOS process technology are available in 230-pin, 6.5mm x 9mm x 0.9mm LGA packages. Volume pricing is available upon request.

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