SKY 77555

monelyy

SKY77555 Tx–Rx FEM Based on CMOS Power Amplifier for
Dual-Band GSM / GPRS (880–915 MHz and 1710–1785 MHz)
Applications
•  Dual-band cellular handsets
encompassing  
-  Class 4 GSM900
-  DCS1800  
-  Class 12 GPRS multi-slot
operation
Features
Description
The SKY77555 is a transmit and receive front-end mo dule (FEM) based on CMOS Power Amplifier for
dual-band cellular handsets comprising GSM900 and DC S1800 operation. Designed in a low profile,
compact form factor, the SKY77555 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 GSM900/DCS1800 CMOS PA,  Tx harmonics filtering, high linearity and low
insertion loss PHEMT RF switches, and diplexer . The CMOS device integrates a full dual-band
GSM/GPRS power amplifier function. High accuracy power control and ramping is achieved on the
CMOS chip via a closed loop power control system. Current drain is limited under load mismatch
【文件名】:11126@52RD_SKY77555-11_201151B.pdf
【格　式】:pdf
【大　小】:591K
【简　介】:
【目　录】:

loveingdao

看不明白呀。。好像不对。

yykk

不明白, 要钱吗?