NEC develops next-generation ultra-wideband wireless transceiver technology

February 8, 2006

1 Min Read

TOKYO -- NEC Corporation (Nasdaq: NIPNY) today announced that it has succeeded in developing the world's first reliable signal creation and processing technology in the wireless 3- to 9-gigahertz (GHz) wide bandwidth range, enabling high-speed wireless transmission of data from computers and digital home appliances. NEC will present the results of this research on February 6 at IEEE International Solid-State Circuits Conference (ISSCC) 2006, being held from February 5-9 in San Francisco, California, U.S.A.

Features of the ultra wideband (UWB) transceiver technology:

1. Development of ultra-wide range compensation circuit technology, which is capable of stable signal creation and processing across a wide spectrum of frequencies (3-9 GHz)

2. Development of ultra low-power supply voltage amplifier technology

3. Development of new technology to compensate for characteristic variation in transistors that use low power

4. Use of a 90-nanometer (nm) advanced CMOS process for high-frequency operation (note 1*)

To realize the wide spectrum of frequencies, NEC developed an oscillator that can generate signals in the 3-9 GHz range. In addition, an ultra-high-speed gain amplifier and band-pass filter have been added into the oscillator to change the gain in accordance with fast band hopping, achieving a flat characteristic output in the 3-9 GHz band. Low-supply voltage amp requires especially high signal-to-noise (S/N) ratio. This new development introduces a new amp that achieves high performance for both large amplitude and noise rejection simultaneously. To date, variation-compensation circuits have had a voltage-adjustment circuit to compensate for distortion in each individual circuit. This new development instead places one voltage-adjustment circuit on a chip and uses a bus to distribute compensation voltages, drastically reducing the amount of power needed for variation correction.

NEC Corp. (Tokyo: 6701)

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