Patent ID: 6252734
Filing Date: 2001-06-26
Classification: G11B,H03J

Abstract:
An arrangement for reproducing an electric signal from a track on a magnetic record carrier, the arrangement comprising:a magnetic read head for reading an electric signal from the track, and for supplying said electric signal to an output;variable equalizer filter means having an input coupled to an output of the magnetic read head, a control signal input and an output, the equalizer filter means equalizing the electric signal read from the track in response to a control signal supplied to the control signal input, and supplying an equalized output signal at the output of the variable equalizer filter means; andcontrol signal generator means having an input coupled to the output of the variable equalizer filter means, and an output coupled to the control signal input of the equalizer filter means, the control signal generator means generating a control signal in response to a signal supplied to the input of the control signal generator means, and supplying the control signal to the output of the control signal generator means;characterized in that, the variable equalizer filter means comprises:a transconductance-capacitor filter having a tuning signal input for receiving a tuning signal, the transconductance-capacitor filter having a magnitude characteristic which increases as a function of increasing frequencies in a frequency range below a reference frequency, the control signal input of the equalizer filter means being coupled to the tuning signal input of the transconductance-capacitor filter, the transconductance-capacitor filter further controlling the reference frequency in a filter characteristic of the transconductance-capacitor filter in response to the control signal, so as to vary an angle of inclination of a filter curve in the filter characteristic below the reference frequency.