Arrangement for reproducing a digital signal from a track on a magnetic record carrier having an equalizer filter in the form of a transconductance-capacitor filter

Abstract

An arrangement for reproducing an electric signal from a track on a magnetic record carrier (,) includes a magnetic read head (,) for reading from the track an electric signal and for supplying the electric signal to an output, and automatic equalizer filter (,), including transconductance-capacitor filter (,). The transc-filter (,) has a tuning signal input (,). The equalizer filter (,) has a control signal input (,) and is adapted to automatically equalize the electric signal read from the track in response to a control signal supplied to its control signal input, and to supply an equalized output signal at its output (,). The tuning signal input of the transc-filter is coupled to the control signal input of the equalizer filter. The arrangement further includes a control signal generator (,) having an output (,) coupled to the control signal input (,) of the equalizer filter (,), the generator being adapted to generate a control signal and to supply the control signal to its output (,). The transconductance-capacitor filter (,) has a magnitude filter characteristic which increases with increasing frequencies in a frequency range below a reference frequency of the filter. The transconductance-capacitor filter is adapted to control the reference frequency in the filter characteristic in response to the control signal, so as to vary the angle of inclination of the filter curve below the reference frequency.