EDGE-DETECT RECEIVER FOR ORTHOPEDIC PARAMETER SENSING
First Claim
1. An integrated edge-detect receiver to detect wave fronts of pulses of energy waves, the edge-detect receiver comprising:
- a preamplifier operatively coupled to receive a pulsed energy wave;
a differentiator operatively coupled to the preamplifier to detect a change in slope;
a pulse circuit operatively coupled to the differentiator to generate a pulse on the wave front of the pulsed energy wave; and
a deblank circuit that desensitizes the preamplifier after the pulse is generated.
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Accused Products
Abstract
A sensor system uses positive closed-loop feedback to provide energy waves into a medium. A sensor comprises a transducer (604), a propagating structure (602), and a reflecting surface (606). A parameter is applied to the propagating structure that affects the medium. The sensor is coupled to a propagation tuned oscillator (416) that forms the positive closed-loop feedback path with the sensor. The propagation tuned oscillator (416) includes an edge-detect receiver (200) that generates a pulse upon sensing a wave front of an energy wave in propagating structure (602). The edge-detect receiver (100) is in the feedback path that continues emitting energy waves into the propagating structure (602). The edge-detect receiver (200) comprises a preamplifier (212), a differentiator (214), a digital pulse circuit (216), and a deblank circuit (218). The transit time, phase, or frequency is measured of the propagating energy waves and correlated to the parameter being measured.
90 Citations
20 Claims
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1. An integrated edge-detect receiver to detect wave fronts of pulses of energy waves, the edge-detect receiver comprising:
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a preamplifier operatively coupled to receive a pulsed energy wave; a differentiator operatively coupled to the preamplifier to detect a change in slope; a pulse circuit operatively coupled to the differentiator to generate a pulse on the wave front of the pulsed energy wave; and a deblank circuit that desensitizes the preamplifier after the pulse is generated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of propagating a plurality of pulsed energy waves into a medium comprising the steps of:
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providing at least one energy wave in the medium at a first location; sensing a propagated energy wave; maintaining positive closed-loop feedback with an edge-detect receiver where at least one energy wave is provided at the first location after sensing the propagated energy wave. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A sensor for measuring a parameter of the muscular-skeletal system comprising:
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a medium as a propagation path of pulsed energy waves where the medium is coupled to or is part of the muscular-skeletal system and where a change in the medium affects at least one of the transit time, phase, or frequency of the pulsed energy waves; and an edge-detect receiver to detect wave fronts of pulsed energy waves from the medium while disregarding secondary waves of each pulsed energy wave where the edge-detect receiver is coupled in a positive closed-loop feedback path with the medium for continued generation and propagation of pulsed energy waves through the medium. - View Dependent Claims (18, 19, 20)
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Specification