LED Drive Circuit And Method For Using Same
First Claim
Patent Images
1. An LED drive circuit for a pulse oximeter comprising:
- a current mirror configured to supply a current to activate an LED of a pulse oximetry sensor.
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Abstract
In various embodiments, there is provided an LED drive circuit and a method for using the same. Specifically, the present disclosure is directed to an LED drive circuit for pulse oximeters. In an embodiment, the LED drive circuit includes a current mirror configured to provide drive current to an LED of a sensor. Additionally, the method includes providing current to first and second current mirrors, wherein the first and second current mirrors are configured to control first and second light sources.
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Citations
20 Claims
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1. An LED drive circuit for a pulse oximeter comprising:
a current mirror configured to supply a current to activate an LED of a pulse oximetry sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A pulse oximetry monitor comprising:
a light drive circuit comprising; a first current mirror drive circuit with a first current input; and a second current mirror drive circuit with a second current input, wherein the first and second current mirror drive circuits are configured to alternately supply current to at least two LEDs. - View Dependent Claims (14, 15, 16, 17)
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18. A method of operating a pulse oximeter light drive circuit comprising:
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providing a first current to a first current mirror, the first current mirror configured to control a first light source; providing a second current to a second current mirror, the second current mirror configured to control a second light source; and turning off current to both the first and second current mirrors for a period after each instance of either the first or second current mirrors being turned on. - View Dependent Claims (19, 20)
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Specification