Patent ID: 7616705

Claim:
A Global Positioning System (GPS) receiver, comprising: a Radio Frequency (RF) Front End, comprising: a single stage downconverter using dual mixers that downconverts a received GPS signal; an I/Q Intermediate Frequency (IF) active filter, coupled to the downconverter; an Automatic Gain Control (AGC) amplifier, coupled to the downconverter; an Analog-to-Digital Converter (ADC) coupled to the AGC amplifier; and a frequency synthesizer section including an integrated Voltage Controlled Oscillator and a reference oscillator with a frequency of 24.5535 MHz plus or minus 40 parts per million (ppm), and further comprising: a frequency doubler coupled to the reference oscillator; a divide-by-9 circuit coupled to the frequency doubler; a phase and frequency detector (PFD) coupled to the divide-by-9 circuit; a charge pump coupled between the PFD and the VCO; the voltage controller oscillator (VCO) that is also coupled to the downconverter; a divide-by-41 circuit coupled to the VCO; and a divide-by-7 circuit coupled between the divide-by-41 circuit and the PFD to make a phase locked loop; and a digital processing section, coupled to the RF Front End, wherein the noise bandwidth of the GPS receiver is set by the IF active filter.