| 摘要 |
PURPOSE:To offer a signal equalization section with an optimum band at all times by applying feedback so that a leading time of an output signal sent from a band control section and a trailing time are constant by a control voltage thereby controlling the band. CONSTITUTION:A band detection section 6 detects the leading time and the trailing time of an output signal of a band control section 4 and after a reference voltage section 5 detects '1', '0' in the output signal of the band control section 4, the result of detection is extracted and recovered by using a clock signal, a reference voltage comparing a signal before clock extraction and recovery and a signal after clock extraction and recovery to keep the result constant is generated and the voltage is fed to a feedback amplifier 7. Thus, a control voltage fed to a band control section 4 by comparing both output signals of a reference voltage section 5 and a band detection section 6 at the feedback amplifier 7 is generated thereby applying feedback so that the leading time and the trailing time of the output signal sent from the band control section 4 are made constant. Thus, a signal equalizing section having an optimum band is always obtained. |
