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1.3 General DescriptionsMT6139 is a highly-integrated RF transceiver IC forthe Global Systems for Mobile Communication(GSM850/GSM900), Digital Cellular CommunicationSystems (DCS1800), and Personal CommunicationServices (PCS1900) cellular systems. It includes fourLNAs, two RF quadrature mixers, a channel filter, aprogrammable-gain amplifier for the receiver, ahigh-precision I/Q modulator for the transmitter, a 26MHz VCXO reference, a fractional-N frequencysynthesizer with a fully-integrated LC-ta
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