Avago公司的 MGA-86576是1.5–8 GHz低噪音GaAs MMIC放大器,不需要阻抗匹配就可用作高性能2 dB NF增益区块,在输入端简单地串接电感,就可使器件在4GHz时的噪音降低到1.6 dB.因此, MGA-86576广泛应作ISM频段的LNA或增益放大级,GPS接收器的前端放大器,PCN和MMDS的LNA或增益放大级,C波段的卫星接收器以及仪表宽带放大器.本文介绍了MGA-86576的主要性能, 方框图, 放大演示电路图以及演示放大器布局图.

MGA-86576 1.5–8 GHz Low Noise GaAs MMIC Amplifier
Avago’s MGA-86576 is an economical, easy-to-use GaAs MMIC amplifier that offers low noise and excellent gain for applications from 1.5 to 8 GHz.

The MGA-86576 may be used without impedance matching as a high performance 2 dB NF gain block. Alternatively, with the addition of a simple series inductor at the input, the device noise figure can be reduced to 1.6dB at 4 GHz.

The circuit uses state-of-the-art PHEMT technology with self-biasing current sources, a source-follower interstage, resistive feedback, and on chip impedance matching networks.

A patented, on-chip active bias circuit allows operation from a single +5 V power supply. Current consumption is only 16 mA.
These devices are 100% RF tested to assure consistent performance.
主要特性:
1.6 dB Noise Figure at 4 GHz
23 dB Gain at 4 GHz
+6 dBm P1dB at 4 GHz
Single +5 V Bias Supply

应用:
LNA or Gain Stage for 2.4 GHz and 5.7 GHz ISM Bands
Front End Amplifier for GPS Receivers
LNA or Gain Stage for PCN and MMDS Applications
C-Band Satellite Receivers
Broadband Amplifier for Instrumentation



图1. MGA-86576方框图



图2. MGA-86576放大演示电路图.



图3.完整的MGA-86576演示放大器布局图.

来源：Avago