Page 25 - Phase-Locked Loops Design, Simulation, and Applications
P. 25
Figure 2.7 Plot of averaged phase detector output signal versus phase error θ . (a)
e
Normal case: waveforms u and u ′ in Fig. 2.6 are symmetrical square waves. (b)
2
1
Waveforms u and u ′ are asymmetrical. The characteristic of the phase detector
2
1
is clipped.
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