GPS receiver LNA circuit based on MAX2641

The MAX2641 is a low-cost, ultralow-noise LNA that can be used in cellular telephones, PCS, GPS, and the 2.4GHz ISM band. Using a single-ended power supply, the voltage is 2.7V to 5.5V and the current consumption is 3.5mA.

The MAX2641 has a frequency range of 1400MHz to 2500MHz, a typical gain of 15.7dB, an input IP3 of 4dBm, and a noise figure of 1.2dB at 1575MHz. The MAX2641 uses an internal bias circuit that does not require external bias resistors and chokes. Only 2 component input matching networks, input/output DC blocking capacitors, and VCC bypass capacitors are required. SOT23-6 package.


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