GNSS SUPERBAND ASIC AND METHOD WITH SIMULTANEOUS MULTI-FREQUENCY DOWN CONVERSION
First Claim
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1. A method of simultaneously down-diverting global navigation satellite system (GNSS) signals in multiple frequency bands, which method comprises the steps of:
- providing an integrated circuit (IC) with multiple signal paths;
receiving GNSS signals corresponding to said frequency bands;
providing a common local oscillator/synthesizer (LO/Synth);
driving each of said signal paths with said LO/Synth;
receiving in said signal paths GNSS signals corresponding to said frequency bands associated with said signal paths respectively;
providing said LO/Synth with a common programmable divider;
simultaneously down-converting said signals to lower intermediate frequencies (IF) with said programmable divider;
providing a multiplexer with multiple out puts and located externally to said IC;
connecting each said signal path to and receiving input from said multiplexer;
providing multiple analog-to-digital converters (ADCs) and connecting each to said programmable divider;
each said ADC receiving a down-converted signal as an input and providing a digital signal as an output;
providing multiple low-noise amplifiers (LNAs) in said signal paths;
electrically connecting each said LNA to a respective multiplexer output;
providing first and second band pass filters located externally to said IC; and
connecting each said BPF to a respective LNA.
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Abstract
A multi-frequency down converter includes first and second signal paths. A common local oscillator/synthesizer drives both of the signal paths. Exemplary applications include GNSS systems operating across superbands. The down converter is adapted for use in a GNSS receiver system.
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Citations
3 Claims
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1. A method of simultaneously down-diverting global navigation satellite system (GNSS) signals in multiple frequency bands, which method comprises the steps of:
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providing an integrated circuit (IC) with multiple signal paths; receiving GNSS signals corresponding to said frequency bands; providing a common local oscillator/synthesizer (LO/Synth); driving each of said signal paths with said LO/Synth; receiving in said signal paths GNSS signals corresponding to said frequency bands associated with said signal paths respectively; providing said LO/Synth with a common programmable divider; simultaneously down-converting said signals to lower intermediate frequencies (IF) with said programmable divider; providing a multiplexer with multiple out puts and located externally to said IC; connecting each said signal path to and receiving input from said multiplexer; providing multiple analog-to-digital converters (ADCs) and connecting each to said programmable divider; each said ADC receiving a down-converted signal as an input and providing a digital signal as an output; providing multiple low-noise amplifiers (LNAs) in said signal paths; electrically connecting each said LNA to a respective multiplexer output; providing first and second band pass filters located externally to said IC; and connecting each said BPF to a respective LNA. - View Dependent Claims (2, 3)
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Specification