Method for identifying changes in signal frequencies emitted by a stylus interacting with a digitizer sensor

A method for identifying that a stylus configured for interacting with a digitizer sensor is hovering over the digitizer sensor, the method comprising:

• receiving a signal transmitted by the stylus on a plurality of sensing elements of the digitizer sensor, wherein each of the plurality of sensing elements is associated with a different area on the digitizer sensor;
• determining a peak formed by signal outputs obtained from the plurality of sensing elements of the digitizer sensor receiving the signal;
• determining position of the stylus on the digitizer sensor responsive to a location of the peak with respect to the digitizer sensor;
• determining at least one ratio between amplitude of signal output from at least one sensing element providing a highest amplitude signal output and amplitude of signal output from at least one other sensing element, wherein the at least one sensing element and the at least one other sensing element are sensing elements from the plurality of sensing elements of the digitizer sensor receiving the signal;
• determining a shape of the peak from the at least one ratio and a defined distance between the plurality of sensing elements;
• and
• determining a height of the stylus above the digitizer sensor from the shape of the peak.