| 摘要 |
PURPOSE:To attain high precision while simplifying the constitution of a unit by separately treating the low-frequency component and high-frequency component of an input signal, by correcting the high-frequency component by a transversal filter and then by correcting the low-frequency component by another correcting circuit. CONSTITUTION:An input signal from signal input terminal 1 is passed through low- frequency stopping filter 2 to remove a frequency component of its cut-off frequency or lower and its output signal is applied to delay circuit 3 having a tapped delay line; and signals lead out of the taps are applied to variable gain circuits 4 to give weight of proper polarity and their output signals are supplied to adder 5. Then, the DC and low-frequency components are previously removed from the input signal and the output signal of adder 5 is waveform-shaped by regenerator 7 and the DC and low-frequency components removed by filter 2 are extracted by high-frequency stopping filter 8, whose output is applied to adder 5 to compensate inter- code interference caused at filter 2 through waveform transmission. |
