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GNSS receivers add position location to handsets

Posted: 20 Feb 2007 ?? ?Print Version ?Bookmark and Share

Keywords:GNSS? receiver? ADC? SiGe? navigation?

SiGe Semiconductor announced the SE4120S and SE4110S global navigation satellite system (GNSS) receiver ICs allowing designers to support position location capabilities in mobile handsets, personal navigation devices and PDAs.

The SE4120S includes an on-chip high-gain LNA capable of delivering 18dB of gain at a noise figure of 1.6dB without the need for active antennas and external amplification. Under controlled conditions, systems using the SE4120S are capable of tracking satellite signals down to as low as -170dBm. The device also uses a 3-wire IF connection bus, with near-zero IF and serialized data output, allowing non-proprietary general-purpose microprocessors running software-defined signal processing to interface to the device in a simple manner.

The SE4110S incorporates an IF filter, a linear automatic gain control (AGC) amplifier, a 2bit ADC, a voltage-controlled oscillator, a tank circuit, an image reject mixer, a PLL, an LNA and a reference oscillator. The on-chip LNA delivers a noise figure of 1.6dB, resulting in an overall system noise figure of 2.5dB typical. The device also features a multibit output and multiple reference frequencies.

The SE4110S and SE4120S both consumer less than 10mA current when working across the 2.7-3.3V supply range and deliver a footprint of 2.2-by-2.2-by-0.4mm.

Pricing begins at $2.45 for 10,000. Samples are currently available.

- Emily Gleason

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