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RF9908

Part Number	RF9908
Manufacturer	RF Micro Devices
Description	CDMA/FM UPCONVERTER/BPSK MODULATOR
Published	Apr 16, 2005
Detailed Description	RF9908 6 Typical Applications • CDMA/FM Cellular Systems • Supports Dual-Mode AMPS/CDMA • Supports Dual-Mode TACS/CDMA •...
Datasheet	RF9908 PDF File

Overview

RF9908 6 Typical Applications • CDMA/FM Cellular Systems • Supports Dual-Mode AMPS/CDMA • Supports Dual-Mode TACS/CDMA • Commercial and Consumer Systems • 3-Cell Battery-Operated Systems CDMA/FM UPCONVERTER/BPSK MODULATOR Product Description The RF9908 is a complete upconverter designed for CDMA/FM cellular applications.
The IC contains a double-balanced mixer stage and an output buffer amplifier stage.
This device may also be used to directly BPSK modulate a carrier.
The mixer is a Gilbert cell with emitter degeneration resistors to provide high IP3.
The output stage is a class-B, push-pull configuration to reduce the overall current and still provide a good 50 Ω output match.
The unit ope...

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