Patent ID: 8324888

Claim:
An inductive angle sensor with improved common mode noise rejection, the inductive angle sensor comprising: an exciting coil formed with a ringshape and connected to an oscillator; a coupler formed with a semicircular shape and spaced a predetermined distance from the exciting coil; a pair of receiver coils disposed between the coupler and the exciting coil and disposed symmetrically on both sides of a center line; and a signal processor connected to the pair of receiver coils to output a signal obtained by adding and subtracting signals obtained from the receiver coils and then multiplying and dividing the signals, wherein the signal processor comprises an adder adding the signals obtained from the pair of receiver coils, a subtracter subtracting the signal obtained from one of the pair of receiver coils from the signal obtained from the other receiver coil, a first multiplier multiplying the value obtained from the adder by the value obtained from the subtracter and connected to a low pass filter, a second multiplier multiplying the value obtained from the subtracter by itself and connected to a low pass filter, and a divider dividing the value obtained from the first multiplier by the value obtained from the second multiplier.