View max2740 datasheet:

19-1670; Rev 0; 4/00 Integrated GPS Receiver and Synthesizer General Description Features The MAX2740 is a complete global positioning system High Selectivity for Hostile Base Station (GPS) receiver from antenna output to digitizer input. Environments The signal path includes the LNA, two downconverters, Complete Antenna-to-Baseband Receiver and variable-gain and fixed-gain amplifiers. By utilizing a double-conversion superheterodyne architecture with Solution external surface acoustic wave (SAW) filters, high levels >100dB Total Receiver Gain Including All Filter of image rejection and blocking immunity are possible. Losses Receiver linearity has been maximized to improve oper- ation in hostile RFI environments found in cellular base >50dB Automatic Gain Control (AGC)