On-line measurements of dielectric relaxation using unorthodox stimuli

The computer has eliminated the need to rely on approximations in the treatment of data, which can now be performed by direct application of FFT algorithms. The authors´ method is based on the fact that the ideally filtered step function, obtained by integration of the impulse response, is a function that can be generated by digital electronic methods. In fact it is in terms of a well known transcendental function, the sine integral, which is tabulated and can also be generated by power