Electromagnetic induction type coordinate positioning apparatus

An electromagnetic induction type coordinate positioning apparatus, adapted for a pointer device, the electromagnetic induction type coordinate positioning apparatus comprising:

• a first induction coil, configured to be inducted a first induction signal when a pointer device comes close;
• a second induction coil, arranged in an interlaced arrangement with respective to the first induction coil along an axial direction, and configured to be inducted a second induction signal when the pointer device comes close;
• a first signal processing circuit, coupled to the first induction coil and the second induction coil, and configured to electrically connect to one of the first induction coil and the second induction coil, to perform a first signal processing procedure on one of the first induction signal and the second induction signal;
• a second signal processing circuit, coupled to the first induction coil and the second induction coil, and configured to, when the first signal processing circuit is electrically connected to one of the first induction coil and the second induction coil, electrically connect to the other one of the first induction coil and the second induction coil, to perform a second signal processing procedure on the other one of the first induction signal and the second induction signal;
• and
• a control circuit, coupled to the first signal processing circuit and the second signal processing circuit, and configured to calculate position information of the pointer device according to the first induction signal and the second induction signal that have been respectively processed by the first signal processing procedure and the second signal processing procedure.