Avago ALM-1912 GPS前端接收方案
Avago 公司的ALM-1912 是GPS前端模块,包括有GPS FBAR滤波器和高增益低噪音放大器(LNA). ALM-1912具有非常低的噪音和极好Cell/PCS/WLAN频带抑制,在1.575GHz,Vdd = 2.7V和Idd = 6mA时,增益为19.3 dB, NF = 1.62 dB, IIP3 = +1.5 dBm,IP1dB = -8 dBm,主要用作GPS前端模块.本文介绍了ALM-1912主要特性和指标, 应用电路, 演示和应用电路元件表以及演示和应用电路框图与S参数测量参考平面.
Avago Technologies’ALM-1912 is a GPS front-end module that combines a GPS FBAR filter with high-gain low-noise amplifier (LNA).The LNA uses Avago Technologies’ proprietary GaAs Enhancement-mode pHEMT process to achieve high gain with very low noise figure and high linearity. Noise figure distribution is very tightly controlled.
A CMOS-compatible shutdown pin is included either for turning the LNA on/off or for current adjustment. The filter use Avago Technologies’ leading-edge FBAR filter for low GPS band insertion loss and exceptional rejection at Cellular, PCS and WLAN band frequencies.
The low noise figure and high gain, coupled with low current consumption make it suitable for use in critical low-power GPS applications or during low-battery situations.
ALM-1912主要特性:
Very Low Noise Figure
Exceptional Cell/PCS/WLAN-Band rejection
Low external component count
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