DEMODULATING DEVICE OF DIGITAL SIGNAL

摘要

PURPOSE:To avoid a mistaken correction, by making effective at least either one of the means to detect a shift of phase and the means to correct the shift of phase for a prescribed period. CONSTITUTION:A reproduced signal is supplied from an input terminal 11, and an nF clock [a clock having (n) times as much as the bit frequency of the input data] is produced by a PLL12. Then the reference clock having a frequency equal to the data frequency is produced by a clock generator 14. With this reference clock, the reproduced signal is decoded to the original data through a decoder 13. Furthermore, the information on the shift of phase sent from a detector 15 for shift of clock phase is supplied to the generator 14 via a gate 16. And a control signal is supplied to the gate 16 through an input terminal 17 to open the gate for a certain time to the reproduced data series and to close the gate otherwise.