公开(公告)号：US5473388A

公开(公告)日：1995-12-05

申请号：US200434

申请日：1994-02-23

申请人： Kazuki Takaki ,  Yoshio Wada

发明人： Kazuki Takaki ,  Yoshio Wada

IPC分类号： H04N5/455 ,  H04N11/16 ,  H04N9/66

CPC分类号： H04N11/165

摘要： A signal demodulator apparatus comprises: an input terminal (11) for inputting an external signal; a delay line (12) connected to the input terminal, for outputting a first delay signal obtained by delaying the external signal by a predetermined time; a phase corrector (13) responsive to the first delay signal outputted by the delay line, for correcting phase of the first delay signal on the basis of a phase difference detection signal and outputting the first phase-corrected delay signal as a second delay signal; and a phase difference detector (16, 15, 19, 20) for detecting a phase difference between the second delay signal outputted by said phase corrector and the external signal inputted through the input terminal and for outputting the phase difference detection signal to the phase corrector to correct the phase difference to a predetermined value. Whenever the delay time of the delay signal disperses due to a manufacturing error or a change with the lapse of time of the delay line (12), it is possible to automatically correct an offset of the phase difference from a normal value.

摘要翻译： 一种信号解调装置，包括：输入端（11），用于输入外部信号; 连接到输入端的延迟线（12），用于输出通过将外部信号延迟预定时间而获得的第一延迟信号; 响应于延迟线输出的第一延迟信号的相位校正器（13），用于基于相位差检测信号校正第一延迟信号的相位，并将第一相位校正的延迟信号作为第二延迟信号输出; 以及相位差检测器（16,15,19,20），用于检测由所述相位校正器输出的第二延迟信号和通过输入端输入的外部信号之间的相位差，并将相位差检测信号输出到相位校正器 以将相位差校正为预定值。 无论何时延迟信号的延迟时间由于制造误差或随着延迟线（12）的经过时间的改变而分散，可以将相位差的偏移与正常值自动校正。