Local buffer circuit for sonic waveguides
First Claim
1. A converter for processing a sonic wave of a magnetostrictive transducer having an exterior surface to an electrical output signal for use by an electronic circuit, the electronic circuit being located outside the exterior surface, the output signal generated by a higher magnitude input pulse, comprising:
- means for converting the sonic wave into the electrical output signal, including a pickup coil having at least two leads, said means for converting being located inside the exterior surface;
first means located inside the exterior surface and connected to said leads having solely passive components for modifying the electrical output signal from said coil to avoid saturation of the electronic circuit by ringing caused by the input pulse.
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Accused Products
Abstract
A local buffer circuit for use with a magnetostrictive transducer is disclosed wherein the magnetostrictive transducer includes a pickup coil and the local buffer circuit includes two diodes in parallel with the pickup coil to clip or short the energy produced in the pickup coil generated by an interrogation pulse, and also includes a common emitter amplifier to reduce the electrical impedance of the pickup coil, also in parallel with the pickup coil.
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Citations
30 Claims
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1. A converter for processing a sonic wave of a magnetostrictive transducer having an exterior surface to an electrical output signal for use by an electronic circuit, the electronic circuit being located outside the exterior surface, the output signal generated by a higher magnitude input pulse, comprising:
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means for converting the sonic wave into the electrical output signal, including a pickup coil having at least two leads, said means for converting being located inside the exterior surface; first means located inside the exterior surface and connected to said leads having solely passive components for modifying the electrical output signal from said coil to avoid saturation of the electronic circuit by ringing caused by the input pulse. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A converter for processing the initial output signal generated by a sonic wave of a magnetostrictive transducer having an outer coveting to produce a modified electrical output signal, comprising:
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a pickup coil located within the outer covering and generating the initial electrical output signal from the sonic wave, said pickup coil having at least two leads; and first means located within the outer covering and connected to said leads of said pickup coil and responsive to the initial electrical output signal for lowering the impedance of said pickup coil, said first means producing the modified electrical output signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A converter for processing a sonic wave of a magnetostrictive transducer to produce an electrical output signal, the magnetostrictive transducer surrounded by an electrical environment, comprising:
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a shield means for shielding electronic noise; a pickup coil within said shield means having a number of windings in the range of 400 to 2500 turns to generate the electrical output signal; and a buffer circuit mounted in close proximity to said pickup coil within said shield means, said buffer circuit minimizing parasitic reactance between said coil and the electrical environment to avoid adverse noise effect on the electrical output signal. - View Dependent Claims (30)
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Specification