Patent ID: 9304615
Filing Date: 2016-04-05
CPC Classification: G06F

Claim Text:
1. A capacitive stylus pen, comprising: an electrode configured to transmit a first signal, the electrode being positioned at a position indicating part of the capacitive stylus pen; a signal generating circuit configured to generate a second signal, the second signal having a frequency that is substantially the same as a frequency of the first signal; a transformer configured to boost the second signal, the transformer including a primary winding and a secondary winding that are wound around a magnetic body; an analog switch configured to set the electrode to an on-state and an off-state by control of a connection between a first end of the secondary winding and the electrode; a power extracting circuit configured to extract power to be supplied to the analog switch from the secondary winding; and a capacitor configured to set a second end of the secondary winding to a fixed potential in an alternating-current manner, the capacitor being coupled to the second end.