Why Put an Attenuator Before an LNA?
You see a receiver design with an attenuator1 before the LNA2 and it feels wrong. Why reduce a weak signal? This post explains this smart trade-off. An attenuator is placed before an LNA to improve the receiver’s blocking performance3. It prevents strong, out-of-band signals from saturating the LNA. This preserves the amplifier’s linearity and ensures […]
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