Patent ID: 11875006
Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. The system of claim 1, wherein the AC-mode bridge is a master AC-mode bridge, and further comprising:
K slave AC-mode bridges, each coupled with the error amplifier and comprising:
a respective first branch to couple with a respective first channel of the touch panel array;
a respective second branch to couple with a respective second channel of the touch panel array;
a respective set of adjustable current sources configured, based on the loop control voltage, to output a respective first sinusoidal current to the respective first branch and to output a respective second sinusoidal current to the respective second branch, such that the respective first branch manifests a respective first branch voltage based on applying the respective first sinusoidal current to a respective first channel self-capacitance of the respective first channel, and the respective second branch manifests a respective second branch voltage based on applying the respective second sinusoidal current to a respective second channel self-capacitance of the respective second channel; and
an output amplifier to generate a respective output voltage based on a difference between the respective first branch voltage and the respective second branch voltage.