Patent ID: 6381082
Filing Date: 2002-04-30
Classification: G01R,G11B

Abstract:
An arrangement for reading information from a record carrier, the arrangement comprising:a read head for reading information in the form of a signal; amplifier means coupled to said read head for amplifying the signal read by the read head; equalizer means coupled to the amplifier means for equalizing the amplified signal; and bit detector means coupled to the equalizer means for detecting bits in the equalized and amplified signal, characterized in that the arrangement further comprises: DC correction means for subtracting a correction value from an input signal in response to an error signal to form a DC-corrected output signal, an input of said DC correction means being coupled to an output of said equalizer means, and the bit detection means being coupled to an output of said DC correction means for detecting a sequence of bits based in the DC-corrected output signal, said DC correction means comprising integrating means for integrating the error signal to form a correction signal, and subtraction means for subtracting the correction signal from the input signal; and error signal generating means for generating the error signal in response to the DC-corrected output signal and the sequence of bits, said error signal generating means comprising subtraction means for subtracting the sequence of bits from the DC-corrected output signal, and an output, for supplying said error signal, coupled to said DC correction means.