Sky77548 Tx-rx Ipac? Front-end Module For Dual-band Gsm / Gprs

  SKY77548 Tx-Rx iPAC? Front-End Module for Dual-Band GSM / GPRS SKY77548 is a transmit and receive Front-End Module (FEM) with Integrated Power Amplifier Control (iPAC?) for Dual-band cellular handsets comprising GSM850/900 and DCS1800/PCS1900 operation. Designed in a low profile, compact form factor, the SKY77548 offers a complete Transmit VCO-to- Antenna and Antenna-to-Receive SAW Filter solution. The FEM also supports Class 12 General Packet Radio Service (GPRS) multi-slot operation. The module consists of a GSM850/900 PA block and a DCS1800/PCS1900 PA block, impedance- matching circuitry for 50 ohm input and output impedances, Tx harmonics filtering, high linearity and a low insertion loss PHEMT RF switch, and a Power Amplifier Control (PAC) block with internal current sense Resistor A custom BiCMOS integrated circuit provides the internal PAC function and decoder circuitry to control the RF Switches The two Heterojunction Bipolar Transistor (HBT) PA blocks are fabricated onto a single Gallium Arsenide (GaAs) die. One PA block supports the GSM850/900 bands and the other PA block supports the DCS1800/PCS1900 bands. Both PA blocks share common power supply pads to distribute current. The output of each PA block and the outputs to the four receive pads are connected to the Antenna pad through a PHEMT RF switch. The GaAs die, PHEMT die, Silicon (Si) die and passive components are mounted on a multi-layer laminate substrate. The assembly is encapsulated with plastic overmold.
Item: SKY77548
File Size : 9 KB
Pages : 2 Pages

Other Part Numbers in this pdf file

Skyworks Solutions, Inc.
Draw SKY77548 Schematic Online for Free