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2G, 2.5G RF LOOPBACK ARRANGEMENT FOR MOBILE DEVICE SELF-TESTING
2G, 2.5G RF LOOPBACK ARRANGEMENT FOR MOBILE DEVICE SELF-TESTING
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机译:用于移动设备自检的2G,2.5G RF回环布置
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摘要
In a mobile communication device a loopback technique is used to enable the receive chain circuitry and digital baseband block to perform self tests on the transmit chain circuitry of the same mobile communication device for 2G and 2.5G operating Bands and channels. A transmit chain circuit is set to transmit a selected receive Band channel, which is attenuated via a loopback path within the mobile communication device's front end module and, in some embodiments, via a leakage signal path between adjacent or proximate LNA inputs of separate receive chain circuits.
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