frequency divided waveforms. Ra and Rb are the receiving
signals which are converted to a square wave signal. Ra1
and Rb1 are the output signals of 1/2-frequency divider,
and Ra2 and Rb2 are the output signals of 1/4-frequency
divider. For the two waveforms (Ra1 and Rb1) for measuring
the phase difference (Dt), the Rb1 waveform instantly shifts
to Rb10 , and the phase difference increases by T. This
problem occurs because the two signals whose phase differences
are compared had not been synchronized to the
waveforms that had passed different frequency dividers.
Two signals are not synchronized, so do not compare
the waveform of the same order. As shown in Fig. 6, for
the two waveforms (Ra2 and Rb2) for measuring the Dt,
the Rb2 waveform instantly shifts to Rb20 , Rb200 and Rb2000 .
The phase difference increases by T, 2T and 3T. Through