DEVICE FOR IDENTIFYING DIGITAL SIGNAL AND METHOD THEREFOR

PURPOSE:To inexpensively constitute an identification circuit for regenerating and receiving a digital signal without using a high speed semiconductor by reducing the clock frequency of the identification circuit. CONSTITUTION:With respect to the output signal of a regenerative signal amplifier 2, by a reproducing and equalizing circuit 3, the unit pulse of a signal transfer interval T is equalized to a prescribed reproducing waveform and reproduction and equalization for compensating the transmission characteristic of a tape head system to a frequency characteristic by which a digital signal is identified easily are executed. Subsequently, by a ternary identification circuit 4, the signal is identified in the period of two folds of a signal transfer interval T and decoded to its original digital modulating signal by an arithmetic circuit 6. In such a manner, an identification clock can be decreased to a half, the circuit configuration can be available without using a high speed semiconductor, the cost can be reduced, and also, the device becomes profitable in a manufacturing process and a design stage.