TRANSFORMER FILTER ARRANGEMENT

摘要

A transformer filter arrangement (30) is disclosed. The transformer filter arrangement comprises a transformer (100) having a first winding (110) and a second winding (120), wherein both of the first and the second winding are located between an outer border (300) and an inner border (310), which is inside the outer border (300). The transformer filter arrangement further comprises one or more reactive sub circuits (130a-b, 330), each comprising one or more inductors (200, 200a-b, 210, 220, 235, 240, 340). The first winding (110) of the transformer (100) is divided into a plurality of winding segments (140a-c). For at least a first one of the one or more reactive sub circuits (130a-b), the reactive sub circuit (130a-b) is connected in series with the winding segments (140a-c) of the first winding (110) between two such winding segments (140a-c), and at least one of the one or more inductors (200a-b) of the reactive sub circuit (130a-b) is located inside said inner border (310). The transformer (100) and the one or more reactive sub circuits (130a-b, 330) are tuned such that the transformer filter arrangement (30) is configured to pass signals at a fundamental frequency and to suppress signals at one or more interfering frequencies. A corresponding integrated circuit (500), a corresponding radio receiver circuit (10), a corresponding radio transmitter circuit (50), and a corresponding radio communication apparatus (1, 2)are also disclosed.