Patent ID: 9083373
Filing Date: 2015-07-14
Classification: H03M,H04L

Abstract:
1. A method comprising: generating quadrature signals on rotation by a quadrature signal generator; converting the quadrature signals into non-overlapping signals by a quadrature signal decoder; receiving the non-overlapping signals by a key matrix; coupling the non-overlapping signals to a corresponding key on the key matrix and each of complementary non-overlapping signals to a common segment output of the quadrature signal decoder, wherein each key is coupled to a corresponding key input and the common segment output; scanning the common segment output to register the quadrature signals as a key press event when a current from the common segment output is sinked and a current is sourced to the corresponding key input; and generating an event update of the key press event corresponding to a direction of rotation of the quadrature signal generator by a driver coupled to the key matrix.