The invention relates to a rotating angle sensor which comprises the components of a stator element with a coil; a rotor element which can perform rotatable supporting around a rotating axis relative to the stator element, wherein the rotor element is implemented for coupled with the coil with different strengths in an induction manner; and an analystic processing unit which determines a rotating angle between the rotor element and the stator element. The coil comprises two partial coils which reversely extend relative to the rotating axis, wherein the partial coils are serially connected through a middle point and furthermore the partial coils are configured on a stator element so that the partial coils are coupled with the rotor element with different strengths in the induction manner. The analystic processing unit is implemented in a manner that two phase-shifted AC voltages are supplied to the two partial coils. The analysitic processing unit comprises two amplifiers which are implemented for regulating amplitude of each AC voltage by means of an amplifying signal. The analystic processing unit is implemented for measuring intermediate potential of an intermediate point, regulating the intermediate potential to zero through changing the amplifying signal and determining a rotation angle according to the amplifying signal.