EMITTER DRIVER FOR NONINVASIVE PATIENT MONITOR
3 Assignments
0 Petitions
Accused Products
Abstract
Embodiments of the present disclosure include an emitter driver configured to be capable of addressing substantially 2N nodes with N cable conductors configured to carry activation instructions from a processor. In an embodiment, an address controller outputs an activation instruction to a latch decoder configured to supply switch controls to activate particular LEDs of a light source.
191 Citations
35 Claims
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1-15. -15. (canceled)
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16. A cable configured to communicate signals between a patient monitor and a noninvasive optical sensor, the cable comprising:
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one or more signal lines configured to carry one or more drive signals to one or more optical radiation sources of the noninvasive optical sensor; N address lines configured to carry N address signals, N being greater than 2; and a decoder comprising N input terminals and up to 2N output terminals, the decoder configured to receive the N address signals from the N address lines via the N input terminals and to implement an addressing system capable of selectively individually addressing 2N unique outputs based on the N address signals, the decoder configured to activate an output terminal of the up to 2N output terminals based on the N address signals thereby activating the one or more optical radiation sources to provide optical radiation to tissue of the patient wearing the noninvasive optical sensor and allowing one or more photodetectors of the noninvasive optical sensor to detect the optical radiation after attenuation by the tissue. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of operating a noninvasive optical sensor, the method comprising:
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providing, by one or more signal lines, one or more drive signals to one or more optical radiation sources of the noninvasive optical sensor; providing, by N address lines, N address signals to N input terminals of a decoder, the decoder configured to implement an addressing system capable of selectively individually addressing 2N unique outputs based on the N address signals, N being greater than 2; and activating an output terminal of up to 2N output terminals of the decoder based on the N address signals causing at least one of the one or more optical radiation sources to transmit optical radiation to tissue of a patient, thereby allowing one or more photodetectors of the noninvasive optical sensor to detect the optical radiation after attenuation by the tissue. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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33. A patient monitor configured to communicate with a noninvasive optical sensor, the patient monitor comprising:
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a processor configured to select a desired wavelength of optical radiation emitted by one or more optical radiation sources of the noninvasive optical sensor; a current control circuit configured to supply a current to the one or more optical radiation sources; and an address control circuit configured to set a wavelength of the optical radiation emitted by the one or more optical radiation sources to the desired wavelength by outputting an address of 2N addresses as a set of N bits transmitted separately via N output terminals, each of at least some of the 2N addresses uniquely corresponding to a different wavelength of the optical radiation emitted by the one or more optical radiation sources, N being greater than 2. - View Dependent Claims (34, 35)
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Specification