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上传时间: 2010-10-08
详细说明： mt6139 is a highly-integrated RF transceiver IC for the Global Systems for Mobile Communication (GSM850/GSM900), Digital Cellular Communication Systems (DCS1800), and Personal Communication Services (PCS1900) cellular systems. It includes four LNAs, two RF quadrature mixers, a channel filter, a programmable-gain amplifier for the receiver, a high-precision I/Q modulator for the transmitter, a 26 MHz VCXO reference, a fractional-N frequency synthesizer with a fully-integrated LC-tank VCO and three built-in LDO regulators for VCO, VCXO and SDM. It is housed in a 40-pin QFN package with a downset paddle for additional grounding. Figure 1 shows the MT6139 functional block diagram. ...展开收缩
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