Patent ID: 6091558
Filing Date: 2000-07-18
Classification: G11B

Abstract:
A device for write precompensation of data signals to be recorded on a magnetic medium, which device has an input for receiving input data signals and an output for supplying output data signals to be recorded, at least some of the signal transitions in these output data signals being delayed with respect to the corresponding signal transitions in the input data signal, characterized by an integrator/limiter circuit which receives the input data signals and which supplies an output signal which is in synchronism with the data signal and whose amplitude varies substantially linearly as a function of time the amplitude being limited within a data symbol interval; an adjustable filter which receives the input signals and supplies an output signal whose instantaneous values depend on the pattern of preceding and/or future signal transitions in the data signal; and a comparator circuit which through comparison of the output signal of the integrator/limiter circuit and the output signal of the filter produces the output signal in which at least some signal transitions of the input data signal can be shifted in time.