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Infineon's low noise amplifiers tweaked for GNSS apps

29 May 2013

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Infineon Technologies AG recently introduced the BGA825L6S, a highly cost-effective Low Noise Amplifier (LNA) for Global Navigation Satellite Systems (GNSS). The device features an ultra-low noise figure, high linearity, high gain and low current consumption over a wide range of supply voltages from 3.6V down to 1.5V.

The company's latest LNA is based on the B7HF SiGe technology which enables a cost-effective and ultra-small solution in a TSLP-6-3 package. The device's noise figure of 0.6dB is touted to be the lowest one currently available in the market. Noise figure is one of the key parameters for GNSS systems as it directly influences the sensitivity of the system, as well as the time-to-first-fix (TTFF) and time-to-subsequent-fix (TTSF).

BGA825L6S offers an optimised out-of-band input intercept point 3rd order (IIP3 oob) of 8dBm. It also provides a gain value of 17.0dB which is optimised for different reference design specifications. With its high linearity and optimised gain value the LNA integrated in the receiver chip ensures reliable GPS function without interference from cellular and Wifi signals from adjacent bands.

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