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E-GSM 900
DCS 1800
PCS 1900
The RF part of the WISMO228 is based on a specific dual band chip which includes:
•
a Digital low‐IF receiver
•
a dual‐band LNA (Low Noise Amplifier)
•
an Offset PLL (Phase Locked Loop) transmitter
•
a Frequency synthesizer
•
a Digitally Controlled Crystal Oscillator (DCXO)
•
a Tx/Rx FEM (Front‐End Module ) for quad‐band GSM/GPRS
Baseband Functionalities
The Baseband is composed of an ARM9, a DSP and an analog element (with audio signals, I/Q
signals and ADC).
The core power supply is 1.2V and the digital power supply is 2.8V.
WA_DEV_W228_PTS_002
Transmit Band (Tx)
880 to 915 MHz
1710 to 1785 MHz
1850 to 1910 MHz
Rev 001
Product Technical Specification &
Customer Design Guidelines
Receive Band (Rx)
925 to 960 MHz
1805 to 1880 MHz
1930 to 1990 MHz
Page 22 of 108
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