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NTLab Launches GNSS RF Front-End with Reduced Power Consumption

November 12, 2014  - By
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NTLabs-front-end Professor Emeritus David Last.

Photo: NTLab

NTLab, a fabless microelectronic company based in Belarus, is offering the NT1051 dual-channel multi-frequency (L1/L2/L3/L5) mutli-system (GPS/GLONASS/Galileo/BeiDou) RF front end.

Manufactured in 0.18 um TSMC BiCMOS technology, it provides operability of the GNSS receiver even if interference power is 120-dB higher than the satellite signal.

The chip was designed to bring benefits of high-grade GNSS receivers to portable devices. To allow reliable navigation in the presence of interference, NT1051 has a 1-dB compression point (on RF input) of -40 dBm. This allows stable tracking, even if the interfering signal is 120-dB higher (compared to -160 dB of typical tracking sensitivity) than the satellite signal.

Simultaneously, portable devices require reduced power consumption. There is always a tradeoff between receiver linearity and consumed current, so the task of combining high dynamic range with low consumption was successfully solved in NT1051 architecture, NTLab said. The resulting power consumption is below 60 mW.

To allow dual-antenna receiver configurations, NT1051 has two separate channels with a common fractional frequency synthesizer.

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