| 摘要 |
<p>A circuit for measuring the angular position of a rotatable device comprising: a resolver connected to the rotatable device and generating sinusoidal signals as a function of an excitation signal and of the resolver angle; a phase shift network (40) receiving the sinusoidal signals and generating leading and lagging phase shifted signals with a relative phase shift proportional to resolver angle; a counter (90) which is enabled by the leading signal and inhibited by the lagging signal so that the contents of the counter (90) represents the relative phase shift, and thus, the angle of the rotatable device, the angular position of the resolver being limited so that the contents of the counter (90) is maintained within a predetermined range in the absence of a fault condition of the resolver terminals; and fault detection logic (60,80,94) for forcing the contents of the counter outside the predetermined range in response to short or open circuit conditions of the resolver terminals, so that misleading angle representations may be recognized as such. </p> |
