Jour : 20 avril 2026

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 […]