To provide an in-band group delay flattening circuit indicating excellent group delay flattening characteristics with small-scale circuit structure, in which a wide band with flat group delay can be taken without generating a peak of group delay quantity in the vicinity of edges on the both sides of passing bands and adjustment of band width and group delay time is facilitated, and a distortion compensation type amplifier having the same.
Resonators 2a, 3a, 2b, 3b are respectively connected with two distribution output ports #2, #4 of hybrid couplers 1a, 1b to provide a plurality of stages of projected type group delay circuits. The in-band group delay flattening circuit is totally constituted by differentiating central frequencies of respective projected type group delay circuits.
MATSUDAIRA MINORU
YAMADA YASUO
