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← ScienceWhich consequence happens to signal integrity as pulse-width modulation frequency increases in a digital signal propagation?
A)Electromagnetic interference energy elevates greatly
B)Effective capacitance of the PCB increases
C)Skin effect losses become much larger✓
D)Reflections from ground bounce become amplified
💡 Explanation
Skin effect increases with frequency because current travels near the conductor’s surface, therefore increasing resistance. This attenuates the signal more; rather than reflections dominating or capacitance increasing noticeably at typical frequencies.
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