This 900 MHz Amplifier Circuit is built with BFG480W which has a good linearity performance. Therefore the BFG480W is well suited for LNAs with high linearity demands, such as Code Division Multiple Access (CDMA) systems. This application note gives an example of a 900 MHz LNA with the BFG480W.

The input and output matching is realised with an LC-combination. Also extra emitter inductance (micro stripline) is used on both emitter-leads to improve the matching and the noise figure. Download it in PDF format! (more…)