A DISTRIBUTED LOW NOISE AMPLIFIER

摘要

A distributed low noise amplifier (DLNA) (10) comprises at least a first amplifier part 30.1 providing a first path 36.1 form an input (14) of the amplifier to an output (22) of the amplifier and a second amplifier part 30.2 providing a second path 36.2 from the input (14) to the output (22). Each of the first and second paths being associated with a respective and different change in phase. The difference being larger than (30) degrees in a noise suppression band to cause a phase difference between noise generated by the amplifier arrangement propagating along the first and second paths and destructive interference of the noise before the output (22) of the DLNA, thereby to suppress noise in the noise suppression band. The respective gains of the amplifier parts 30.1 to 30. n may decrease in a direction from the input (14) of the amplifier (10) to the output (22) thereof.