Monolithic GPS RF front end integrated circuit
First Claim
1. A highly integrated Global Positioning System (GPS) RF front end, comprising:
- a Radio Frequency Integrated Circuit (RFIC) including;
a single stage downconverter using dual mixers;
an I/Q Intermediate Frequency (IF) active filter, coupled to the downconverter, wherein the IF active filter is selectively powered-on and powered-down within the RE front end;
an Automatic Gain Control (AGC) amplifier, coupled to the downconverter;
an Analog-to-Digital Converter (ADC), coupled to the AGC amplifier; and
a frequency synthesize section, wherein the noise bandwidth of the GPS RF front end is set by the IF active filter when the IF active filter is selective powered-on.
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Abstract
A highly integrated GPS RF Front End which uses a single conversion stage employs an image rejection mixer stage to eliminate the need for an image reject RF bandpass filter. Also a relatively high sample rate A/D is employed which allows a timeless monolitic IF Filter to be used. The disclosure also discusses a GPS Front End topology that is easily integrated from industry standard building blocks. With the broad variation in potential receiver designs, the present invention includes some specific receiver topologies that lend themselves to a high level of integration. The specific designs presented here are comprised of industry standard building blocks and functions that have been described elsewhere in the related art.
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Citations
15 Claims
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1. A highly integrated Global Positioning System (GPS) RF front end, comprising:
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a Radio Frequency Integrated Circuit (RFIC) including; a single stage downconverter using dual mixers; an I/Q Intermediate Frequency (IF) active filter, coupled to the downconverter, wherein the IF active filter is selectively powered-on and powered-down within the RE front end; an Automatic Gain Control (AGC) amplifier, coupled to the downconverter; an Analog-to-Digital Converter (ADC), coupled to the AGC amplifier; and a frequency synthesize section, wherein the noise bandwidth of the GPS RF front end is set by the IF active filter when the IF active filter is selective powered-on. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification