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Which mechanism limits switching speed in capacitive touchscreen controllers during rapid input?

A)Parasitic capacitance discharging delay
B)Electromagnetic interference from LCD
C)Debouncing algorithms for noise filtering
D)Processor clock speed synchronization lag

💡 Explanation

During rapid input, parasitic capacitance creates a charging and discharging delay because each capacitive element needs time to reach a threshold voltage, limiting the controller's ability to register fast changes. Therefore parasitic capacitance establishes a limit on switching speed, rather than EMI, debouncing or clock speed, which relate to other system limitations.

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