Keyed pulse sensor circuit
Data receiving device for reproducing a received symbol from a received data signal Patent #: 5638409
ApplicationNo. 848525 filed on 04/28/1997
US Classes:327/100, SIGNAL CONVERTING, SHAPING, OR GENERATING327/155, With feedback327/559, Highpass375/345, Automatic gain control375/376Phase locked loop
ExaminersPrimary: Wells, Kenneth B.
Attorney, Agent or Firm
International ClassH03K 017/00
AbstractDisclosed is a method for transient suppression in synchronous data protection systems which includes high-pass filtering of the signal produced by the sampling and shaping circuits before the signal enters the timing and gain control circuits. This high-pass filtering may be turned on when a transient is detected, in anticipation of a previously detected transient, or may be always on. Using the high-pass version of the shaped signal allows the timing loop and the gain loop to function during a transient interval, thus maintaining timing and gain lock during such an interval.