Abstract: Circuit arrangement for calculating matrix operations, such as those which recur frequently in signal processing, specifically in conjunction with neural networks, having a systolic array of multipliers and adders, downstream from which a recursive accumulator is connected. In addition to products, sums and differences of matrices, this circuit arrangement also allows squares, absolute magnitudes of sums and differences and squares of sums and differences of two matrices to be calculated very efficiently. Furthermore, with the aid of the recursive accumulator, it is possible to transpose matrices, to calculate row sums and column sums, and to search for minimum or maximum matrix elements.