Samsung SPH-A900 Service Manual page 14

Circuit Description
2-4. GPS Section
Intenna
Intenna receives a signal from GPS satellites.
It is a tri-band Intenna and covers PCS band, CDMA band and GPS band.
RF Switch
It(U401:TQP4M3018) is used to switch the PCS path and CDMA path and the GPS
path. The RF signal passes through PCS path when PCS_MODE is high(2.6V). The RF signal
passes through CDMA path when CELL_MODE is high(2.6V). The RF signal passes through
GPS path when GPS_MODE is high(2.6V). PCS_MODE, CELL_MODE and GPS_MODE are
digital signals from MSM6500 GPIO.
Low Noise Amplifier Module(LNA)
The low noise amplifier(U302:ALM1106) amplifies a weak signal received from artificial satellite to
obtain the optimum signal level.
RF Band Pass Filter(Rx RF SAW Filter)
The RF BPF(U404:B9000) passes only a specific frequency(1575.42±1MHz) from the signal received
from the satellite. The bandwidth is 2 MHz.
2-10
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization