Function : SKY77500 iPAC FEM for Quad-Band GSM / GPRS
Maker : Skyworks Solutions
The SKY77500 is a transmit and receive Front End Module (FEM) designed in a low profile (1.2 mm), compact form factor for quad-band cellular handsets comprising GSM850/900, DCS1800, and PCS1900 operation—a complete transmit VCO-to-Antennaand Antenna-to-receive SAW filter solution.The FEM also supports Class 12 General PacketRadio Service (GPRS) multi-slot operation.
The module consists of separate GSM850/900 and DCS1800/PCS1900 PA blocks, internal circuitry for matching to 50 Ωinput and output impedances, TX harmonics filtering, high linearity and low insertion loss PHEMT RF switches, diplexer, and an integrated power amplifier control (iPAC™) function that utilizes an internal current-sense resistor. A custom silicon integrated circuit contains decoder circuitry to control the RF switches while providing a low current external control interface.
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