TRANSDUCER DRIVER FOR MEASURING A PARAMETER OF THE MUSCULARSKELETAL SYSTEM
First Claim
1. A transducer driver circuit in a positive closed-loop path that generates time and frequency specific energy waves and pulses to measure a parameter of the muscular-skeletal system.
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Accused Products
Abstract
A measurement system for capturing a transit time, phase, or frequency of energy waves propagating through a propagation medium is disclosed. The measurement system comprises two different closed-loop feedback paths. The first path includes a transducer driver (726), a transducer (704), a propagation structure (702), a transducer (706), and a zero-crossing receiver (740). The transducer driver (726) efficiently drives the transducer (704) and comprises a digital driver (106), a level shifter (112), and a matching network (114). A second path includes a transducer driver (1126), a transducer (1104), a propagation medium (1102), a reflecting surface (1106), and an edge-detect receiver (1140). Energy waves in the propagating medium (1102) are reflected at least once. The edge-detect receiver (1140) detects a wave front of an energy wave. Each positive closed-loop path maintains the emission, propagation, and detection of energy waves in the propagation medium.
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Citations
20 Claims
- 1. A transducer driver circuit in a positive closed-loop path that generates time and frequency specific energy waves and pulses to measure a parameter of the muscular-skeletal system.
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11. A sensor comprising:
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a first transducer; a propagation medium where the first transducer is coupled to the propagation medium at a first location; and a second transducer coupled to the propagation medium at a second location where the series and parallel resonance of the first transducer does not overlap the series and parallel resonance of the second transducer. - View Dependent Claims (12, 13, 14, 15)
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16. A sensor system comprising:
a transducer driver coupled in positive closed-loop feedback comprising; a digital driver having an input and an output; a level shifter having an input coupled to the input of the digital driver and an output; and a matching network having an input coupled to an output of the level shifter and an output. - View Dependent Claims (17, 18, 19, 20)
Specification