标签: max2741

在商用和专用无线应用中，全球定位卫星的L1波段信号最微弱。GPS接收机天线收到的信号功率通常都淹没在热噪声基底中。为成功地恢复出这些微弱信号，接收机必须具有足够高的接收灵敏度，并能抑制带外干扰。本文主要讨论在设计一个外围元件很少的低成本商用GPS接收机时应该考虑的关键系统参数。这种系统的目标接收灵敏度为-139dBm。……

MAX274119-3559;Rev0;1/05KITATIONEVALULEBAILAAVIntegratedL1-BandGPSReceiverGeneralDescriptionFeaturesSupportsAllPopularHandsetReferenceFrequenciesUpto26MHz4.7dBCascadedNoiseFigure80dBCascadedGainTolerates-90dBmIn-BandJammerTolerates+13dBmCDMAOut-of-BandJammeratDeviceInputIntegratedSynthesizerandVCOIntegrated2-or3-BitADC50dBIFAGCRangeSmall28-PinThinQFNPackageSPIControlInterfaceClockOutputforBasebandProcessorSPIisatrademarkofMotorola,Inc.MAX2741TheMAX2741L1-bandGPSreceiverICoffersahighperformance,compactsolutionformobilehandsets,PDAs,andautomotiveapplications.Totalvoltagegainof80dBanda4.7dBcascadednoisefigurecanprovidereceiversensitivityforapplicationsrequiring-185dBW……