Abstract: A method of obtaining a final signal of low harmonic content from a waveform consisting of individual amplitude steps approximating an original signal such as a measurement quantity or the like includes successively interpolating between the values of each two mutually adjacent ones of the individual amplitude steps over a period of time defined by the time spacing between corresponding points of the mutually adjacent steps.A circuit arrangement for carrying out the method contains an integrator which has two storage devices on the input side; the one storage device is connected through a switch device through a further switch to an arrangement which transmits the individual amplitude steps. A control device is associated with the switches.