| 摘要 |
The present disclosure provides a force-sensitive stylus having a first electromagnetic coil located at a fixed position within a housing and a second electromagnetic coil that is attached to a moveable tip element and positioned to interact with the first electromagnetic coil, such that the position of the second electromagnetic coil relative to the first electromagnetic coil is dependent upon the force applied to the tip element. A control circuit energizes a transmitting coil of the first and second electromagnetic coils with a radio frequency signal and senses the current induced in the other coil to determine the force on the tip element. The force may be encoded in the radio frequency signal and then transmitted to a host electronic device by re-energizing the transmitting coil. |
