G - Physics – 05 – B
Patent
G - Physics
05
B
318/30
G05B 1/01 (2006.01) G05D 3/12 (2006.01)
Patent
CA 1067137
IMPROVED PHASE-SENSITIVE TRANSDUCER APPARATUS ABSTRACT OF THE DISCLOSURE A phase-sensitive transducer apparatus comprises first and second relatively movable members wherein the first relatively movable member has a plurality of windings and the second relatively movable member has a winding. A first input signal is applied to one of the windings of the first relatively movable member and a second input signal to another of the windings of the first relative movable member. An output signal is induced on the winding of the second relatively movable member. The first and second input signals are sinusoidal in nature of substantially identical frequency and peak amplitude and are phase- displaced by a predetermined amount, and the output signal is substantially constant in peak amplitude and variable in phase during relative movement of the first and second relatively movable members. The circuit for generating the first and second input signals includes a clock generator for generating a clock signal at a clock frequency and a square-wave generator coupled to the clock generator and responsive to the clock signal for generating a plurality of mutually phase-displaced square-wave signals of substantially identical frequency and peak amplitude. The circuit is capable of deriving the first input signal from a first group of the plurality of square-wave signals and the second input signal from a second group of the plurality of square- wave signals different from the first group. The first and second input signals are then coupled to the respective windings of the first relatively movable member.
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