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.
2 Assignments
0 Petitions
Accused Products
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.
107 Citations
20 Claims
-
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)
-
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)
-
18. A method of operating a pulse oximeter light drive circuit comprising:
-
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)
-
Specification