steadyj
Newbie level 6
Hi all, I am confused about the judge of "lead" or "lag" in phase detector.
Figure 1 is a phase detector. Figure 2 is the waveform when A leads B. But the fact "A leads B" seems to depend on the initial time. As shown in Figure 3, if the initial time is the red vertical line, it becomes "A lags B". And the output pulses will be on Qb instead of on Qa.
So what is wrong with my logic? I believe phase detector should work in a reliable way instead of depending on the arbitrary initial time. What is the real way phase detector works?
Figure 1 is a phase detector. Figure 2 is the waveform when A leads B. But the fact "A leads B" seems to depend on the initial time. As shown in Figure 3, if the initial time is the red vertical line, it becomes "A lags B". And the output pulses will be on Qb instead of on Qa.
So what is wrong with my logic? I believe phase detector should work in a reliable way instead of depending on the arbitrary initial time. What is the real way phase detector works?