The present invention relates to the application on the basis of the equalizer to the input data signal, it equalized data signal configured to detect a data device. The apparatus comprises a passive equalizer and a second signal path configured to generate a second signal by filtering the first signal path, the input signal is configured to generate a first signal based on the input signal. The apparatus comprises further a first and a second input configured to generate a third signal related to the combining circuit of the signal, and the detection data having a detection circuit configured to generate data based on the third signal amplifier. Strong data detection circuit may be configured as a latch arm. The third signal may be a differential current comprising a positive and negative current component. Strong-arm latch, on the basis of whether the positive current component is greater than a negative-current component to generate the data.