HA-5127, HA-5137, HA-5147, Ultra Low Noise Amplifiers HA-5127, HA-5137, HA-5147, Ultra Low Noise Amplifiers Application Note August 1998 AN553.1 Author: Alan Hansford Introduction dramatically increase the frequency response of the amplier compared to that of other construction techniques. Engineers interested in precision signal processing will nd the HA-51X7, with its unique features, very i……