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Product Overview: Ultra Low Noise Two-Stage Amplifiers
Skyworks new two-stage Low Noise Amplifier (LNA) products meet the demanding ultra low noise figure and high linearity needs of today's receiver designs. Fabricated from Skyworks' advanced pseudomorphic high electron mobility transistor (pHEMT) process, these multi-stage amplifiers have the flexibility to achieve varied gain and linearity. These devices are offered in a small, low cost 8-lead QFN 2 x 2 mm package which is compatible with the footprint of the TSLP package.
An integrated interstage matching network on die to reduce the external SMTs is needed. Using the recommended schematics from Skyworks, the device has a tested low noise figure of 0.6 dB and gain of 17 dB. The device also allows designers to adjust current and gain without degrading noise figure. The gain is adjustable through use of feedback, and can be increased as high as 25 dB by removing feedback components.
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