11/10/2003 - Cementing its 25-year history as a world leader in solid-state RF power devices, Royal Philips Electronics (NYSE: PHG, AEX: PHI), announced a breakthrough in LDMOS (Laterally Diffused Metal Oxide Semiconductor) technology that can reduce the complexity and operating costs of 3G cellular base stations while at the same time enhancing their performance and reliability. RF power transistors fabricated using Philips' new 4th generation LDMOS technology operate with higher gain and higher operating efficiencies than existing LDMOS devices. As a result, fewer gain stages are needed in RF power amplifiers and less operating energy is wasted. The exceptional linearity of these new transistors, even at high power levels, means they meet the ultra-low distortion requirements of multi-carrier W-CDMA and GSM EDGE base station amplifiers.
The rollout of long awaited 3G cellular infrastructures is seen as the next big step in delivering a richer multi-media experience and more advanced data services to mobile users. The same characteristics that make Philips' LDMOS technology ideal for use in new 3G infrastructures also allows it to be used in transmitters for the many digital terrestrial TV systems that are currently being rolled out across the world.
"With our 4th generation LDMOS technology we have given RF power amplifier designers the extra design space they need to overcome difficult efficiency versus linearity trade-offs," said Rick Dumont, marketing manager for LDMOS RF Power Devices at Philips Semiconductors. "These new devices will make it significantly easier to meet the performance requirements of systems such as W-CDMA at the price points demanded by the telecommunications industry and will further strengthen our position as a leading supplier of LDMOS RF power devices to key cellular infrastructure manufacturers."
Philips' new 0.6 µm LDMOS technology takes RF power transistor performance to a whole new level, achieving a 50% higher power density, a 6% to 8% higher W-CDMA efficiency, and a 2 dB higher power gain than previous 0.8 µm technologies. In addition, the patented double gold metalization and gold-gold wirebonding used in these transistors extends their MTTF (Mean Time To Failure) by 8 to 10 times that of conventional LDMOS devices, or alternatively allows designers to operate them at junction temperatures up to 20°C higher. Due to the intrinsically low system efficiency of W-CDMA power amplifiers, all these features significantly reduce power consumption and thermal issues in state-of-the-art 3G base stations and facilitate the trend towards mast-mounted rather than ground-based amplifiers. The exceptional backoff linearity of Philips' 4th generation LDMOS transistors particularly suits them for MCPA (Multi-Carrier Power Amplifier) and future DPD (Digital Pre-Distortion) applications.
The first power transistors to utilize this breakthrough LDMOS technology are being sampled in the 4th quarter of this year and will be ready for volume production in the 1st quarter of next year. The first device to be introduced will be the BLF4G22-100, a WCDMA transistor with 13.5 dB gain, a gain flatness of 0.1 dB (2110 to 2170 MHz), and 2-carrier WCDMA operating efficiency of 26% at a power output of 24 W, an ACPR of -40 dBc and IMD of -36 dBc. Peak output power for this transistor under the above operating conditions with an IS95 signal and 3dB compression of the CCDF is over 150W. Philips' 4th generation LDMOS technology will ultimately be applicable across all cellular frequency bands from 800 MHz to 2.2 GHz. Philips' LDMOS roadmap shows that in future developments, the advanced fabrication capabilities of the company's 0.18-µm mainstream CMOS manufacturing process will be leveraged.
About Royal Philips Electronics
Royal Philips Electronics of the Netherlands is one of the world's biggest electronics companies and Europe's largest, with sales of EUR 31.8 billion in 2002. It is a global leader in color television sets, lighting, electric shavers, medical diagnostic imaging and patient monitoring, and one-chip TV products. Its 166,500 employees in more than 60 countries are active in the areas of lighting, consumer electronics, domestic appliances, semiconductors, and medical systems. Philips is quoted on the NYSE (symbol: PHG), London, Frankfurt, Amsterdam and other stock exchanges. News from Philips is located at www.semiconductors.philips.com
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