Hi, I'm looking into matching a CC1125 to a Skyworks SKY65366-21 (or 11) at 459MHz and I'm trying to understand the LNA Balun from all of the TI Reference designs.
In the attached picture I don't understand the purpose of L191.
I understand the 4 component balun but not why there is an inductor between the positive and negative inputs on the balanced side?
The pic is from the 420-470MHz ref design.
Thanks