onsider a simple capacitive touch sensor comprised of a resistor with resistance R=1.57 MΩ and a capacitor with capacitance C=1.09 nF connected in series. A standard wall outlet powers the sensor with an output frequency f=50.0 Hz. Pressing the sensor triples the capacitance of the circuit. A logic gate detects a change in the circuit's impedance.

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Nowadays, touch screen devices are everywhere.

Consider a simple capacitive touch sensor comprised of a resistor with resistance R=1.57 MΩ and a capacitor with capacitance C=1.09 nF connected in series. A standard wall outlet powers the sensor with an output frequency f=50.0 Hz. Pressing the sensor triples the capacitance of the circuit. A logic gate detects a change in the circuit's impedance.

Determine the initial impedance Z0 of the circuit in megaohms (MΩ).

 

Determine the impedance Zp of the circuit with a pressed sensor in megaohms (MΩ).

 

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