An integrated transformer arrangement (200, 400, 500) for combining output signals of multiple differential amplifiers to a single-ended load, wherein the integrated transformer arrangement comprises: a first transformer branch, wherein the first transformer branch comprises: an inductor loop (401, 501) comprising a set of N≥3 windings, wherein each winding comprises: - a first internal node, a second internal node, a third internal node, and a fourth internal node; - a first half winding connected between the first internal node and the third internal node; - a second half winding connected between the second internal node and the fourth internal node; and wherein, - the first internal node and the second internal node of the 1st winding (411, 511, 601) are interconnected; - the third internal node and the fourth internal node of the Nth winding (451, 541, 60N) are interconnected; - the first internal node and the second internal node of the jth winding (421, 521, 531), 2≤j≤N, are connected to the third internal node and the fourth internal node, respectively, of the (j-1)th winding; and the first transformer branch further comprises: a number of primary inductors, wherein each primary inductor comprises a winding (412, 512) placed concentrically to one winding of the inductor loop, and each primary inductor is configured to couple to a differential output of one of the multiple differential amplifiers; and the integrated transformer arrangement further comprises: a secondary inductor comprising a winding (453, 552) placed concentrically to a winding of the inductor loop, and the secondary inductor is configured to couple to the single-ended load. a first transformer branch, wherein the first transformer branch comprises: an inductor loop (401, 501) comprising a set of N≥3 windings, wherein each winding comprises: - a first internal node, a second internal node, a third internal node, and a fourth internal node; - a first half winding connected between the first internal node and the third internal node; - a second half winding connected between the second internal node and the fourth internal node; and wherein, - the first internal node and the second internal node of the 1st winding (411, 511, 601) are interconnected; - the third internal node and the fourth internal node of the Nth winding (451, 541, 60N) are interconnected; - the first internal node and the second internal node of the jth winding (421, 521, 531), 2≤j≤N, are connected to the third internal node and the fourth internal node, respectively, of the (j-1)th winding; and - a first internal node, a second internal node, a third internal node, and a fourth internal node; - a first half winding connected between the first internal node and the third internal node; - a second half winding connected between the second internal node and the fourth internal node; and wherein, - the first internal node and the second internal node of the 1st winding (411, 511, 601) are interconnected; - the third internal node and the fourth internal node of the Nth winding (451, 541, 60N) are interconnected; - the first internal node and the second internal node of the jth winding (421, 521, 531), 2≤j≤N, are connected to the third internal node and the fourth internal node, respectively, of the (j-1)th winding; and the first transformer branch further comprises: a number of primary inductors, wherein each primary inductor comprises a winding (412, 512) placed concentrically to one winding of the inductor loop, and each primary inductor is configured to couple to a differential output of one of the multiple differential amplifiers; and the integrated transformer arrangement further comprises: a secondary inductor comprising a winding (453, 552) placed concentrically to a winding of the inductor loop, and the secondary inductor is configured to couple to the single-ended load. a number of primary inductors, wherein each primary inductor comprises a winding (412, 512) placed concentrically to one winding of the inductor loop, and each primary inductor is configured to couple to a differential output of one of the multiple differential amplifiers; and the integrated transformer arrangement further comprises: a secondary inductor comprising a winding (453, 552) placed concentrically to a winding of the inductor loop, and the secondary inductor is configured to couple to the single-ended load.