With operating frequencies exceeding 300MHz， National’s line of monolithic and hybrid current feedback operational amplifiers have become an attractive option for the RF （and IF） design engineer. Typical operational amplifier specifications do not， however， include many of the common specifications familiar to RF engineers. To help the designer exploit the many advantages these amplifiers can offer， this application note will define the RF specifications of most interest to designers， detail what determines each of these particular performance characteristics for National’s current feedback op amps， and， where possible， discuss performance optimization techniques. To apply op amps to RF applications， questions in three general areas must be addressed：