Biased acoustic switch for implantable medical device
First Claim
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1. A medical device, comprising:
- an energy storage device;
at least one acoustic transducer configured to convert an acoustic signal into an alternating current (AC) electrical signal;
at least one signal detector coupled to the at least one acoustic transducer and configured to generate an activation trigger signal when the AC electrical signal exceeds a specific trigger threshold, wherein the signal detector includes a DC biasing element that sets the specific trigger threshold, the DC biasing element configured to supply a DC biasing voltage to the signal detector;
a control circuit; and
a deactivation/activation switch configured to switch the medical device between an inactive state and an active state in response to the trigger signal.
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Abstract
Devices, systems, and methods for selectively activating medical devices are disclosed. A medical device in accordance with an illustrative embodiment includes an energy storage device, an acoustic transducer configured to convert an acoustic signal into an electrical signal, a signal detector configured to generate a trigger signal when the electrical signal exceeds a specific threshold established by a biasing element, a control circuit, and an activation/deactivation switch configured to switch the medical device between an inactive state and an active state in response to the trigger signal.
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Citations
24 Claims
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1. A medical device, comprising:
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an energy storage device; at least one acoustic transducer configured to convert an acoustic signal into an alternating current (AC) electrical signal; at least one signal detector coupled to the at least one acoustic transducer and configured to generate an activation trigger signal when the AC electrical signal exceeds a specific trigger threshold, wherein the signal detector includes a DC biasing element that sets the specific trigger threshold, the DC biasing element configured to supply a DC biasing voltage to the signal detector; a control circuit; and a deactivation/activation switch configured to switch the medical device between an inactive state and an active state in response to the trigger signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A medical device, comprising:
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an energy storage device; at least one acoustic transducer configured to convert an acoustic signal into an alternating current (AC) electrical signal; at least one signal detector configured to generate an activation trigger signal when the AC electrical signal exceeds a specific trigger threshold; a control circuit configured for dynamically adjusting the specific trigger threshold; an operative element configured for performing one or more medical functions; and an deactivation/activation switch coupled to the energy storage device and the control circuit, wherein the deactivation/activation switch, in response to the activation trigger signal, changes from a first state that prevents current flow from the energy storage device to the control circuit to a second state that allows current flow from the energy storage device to the control circuit.
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24. A system for acoustically activating a device, comprising:
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a first device configured to transmit an acoustic signal; and a second device in wireless communication with the first device, the second device including; an energy storage device; at least one acoustic transducer configured to convert the acoustic signal received from the first device into an alternating current (AC) electrical signal; at least one signal detector coupled to the at least one acoustic transducer and configured to generate an activation trigger signal when the AC electrical signal exceeds a specific trigger threshold, the signal detector including a DC biasing element that sets the specific trigger threshold, the DC biasing element configured to supply a DC biasing voltage to the signal detector; a control circuit; and a deactivation/activation switch configured to switch the second device between an inactive state and an active state in response to the trigger signal.
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Specification