Avago ALM-1812高增益GPS前端方案

Avago公司的ALM-1812是高增益低噪音GPS前端放大器,组合了高增益LNA和GPS FBAR滤波器.LNA采用Avago的GaAs增强模式pHEMT工艺,而一流的FBAR滤波器在Cell/PCS频段有极好的抑制特性,大于85dB. ALM-1812的增益为19.1dB,NF为1.66dB,IIP3 = +2 dBm, IP1dB = -8 dBm.本文介绍了ALM-1812主要特性和指标, 应用电路,演示板布局和电路图以及所用元器件与散射参数和测试参考平面图.

ALM-1812: High-Gain GPS Low Noise Amplifier with Integrated Filters and Variable Current/Shutdown Function

Avago Technologies’ ALM-1812 is a GPS front-end module that combines a high-gain low-noise amplifier (LNA) with GPS FBAR filters. 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 integrated filter utilizes an Avago Technologies’ leading-edge FBAR filter for exceptional rejection at Cell/PCS-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-1812主要特性:

• Very Low Noise Figure
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