Patent ID: 11863174
Assignee: PIXART IMAGING INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A detection chip, configured to be electrically coupled to an electrode, the detection chip comprising:
a charging circuit, configured to provide a first charging current within a first charging interval, and provide a second charging current, smaller than the first charging current, within a second charging interval;
a discharging circuit, configured to provide a first discharging current within a first discharging interval, and provide a second discharging current, smaller than the first discharging current, within a second discharging interval;
a counter, configured to sequentially count the first charging interval, the second charging interval, the first discharging interval and the second discharging interval as a detection cycle; and
a processor, configured to identify a touch event according to the second charging interval and the second discharging interval without according to the first charging interval and the first discharging interval.