Apparatus for correcting waveform distortion

An apparatus for correcting wave distortion, comprising:

• delay means to which an input signal is supplied;
• said input signal being so modulated that an accumulated value of a time interval from its leading edge to its trailing edge equal to another accumulated value of another time interval from a trailing edge to a leading edge, and
• said delay means generating plural delayed outputs, each of which has a certain time delay shorter than said time interval;
• selecting means for performing a selecting operation in which a plurality of delayed signals among said plural delayed outputs are selected;
• synthesizing means for performing a synthesizing operation in which said plurality of delayed signals are synthesized so that a synthesized signal can be obtained by correcting at least one of said time interval and said another time interval through said certain time delay;
• detecting means for detecting a difference between a time interval from a leading edge to a trailing edge and another time interval from a trailing edge to a leading edge of said synthesized signal out of said synthesizing means;
• means for generating a control signal which controls, based on a detected output by said detecting means, said selecting operation of selecting means and said synthesizing operation of a synthesizing means so as to accumulate a value of a time interval from a leading edge to a trailing edge of said synthesized signal equal to another accumulated value of another time interval from a trailing edge to a leading edge of said synthesized signal.