| 摘要 |
PURPOSE:To compensate reduced and interrupted distortion and to prevent an equalizer from interference between codes to attain precise transmission by extracting a high frequency interrupting component of a repeating output signal, locking the extracted component in phase with an input side low frequency interrupting signal, and superposing the extracted component to the input side low frequency interrupting signal. CONSTITUTION:A signal inputted to a transmission line signal input part I and superposed by a DC component for driving a pulse signal and a repeater is inputted to a power separating filter (a) which is a high pass filter, then the reduced and interrupted component is inputted to a compensating circuit 1 consisting of a feedback circuit (e), delay circuit (f) and a delay time control circuit (g) and having reduced and interrupted distortion. The delay circuit (f) delays the reduced and interrupted component, makes the component coincide with a feedback compensating component from a transmission line signal output part (O) at its time and superposes the feedback compensating component to the reduced and interrupted component to output the superposed component to a waveform equalizer (b). The delay time control circuit (g) monitors a feedback compensating signal and controls the delay time of the delay circuit (f) so that the feedback compensating signal is made to coincide with the inputted reduced and interrupted component at the time always optimumly. |
