Patent ID: 11914812
Assignee: SIGMASENSE, LLC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 19:
20. The current reference operative DSC of claim 19, wherein, when enabled, the one or more processing modules is further configured to execute the operational instructions to:
before the change of the impedance of the touch screen capacitive load, process the digital signal that is representative of the load voltage to determine a first value of load voltage;
after the change of the impedance of the touch screen capacitive load, process the digital signal that is representative of the load voltage to determine a second value of load voltage that is based on the change of the impedance of the touch screen capacitive load; and
determine the change of the impedance of the touch screen capacitive load based on the first value of load voltage, the second value of load voltage, and the sinusoidal current reference signal.