METHODS AND SYSTEMS FOR PROVIDING POWER TO LIGHT SOURCES OF A PHYSIOLOGICAL MONITOR
First Claim
1. A photoplethysmography (PPG) system, the system comprising:
- a light drive circuit configured to provide a digital signal that provides power to a light source, the digital signal comprising a plurality of pulses, wherein at least one feature of the plurality of pulses is adjustable to vary the power provided to the light source, the light drive circuit being further configured to provide power to the light source during each pulse of the plurality of pulses, and wherein the plurality of pulses comprises one or more periods;
a front end channel circuit configured to receive light generated by the light source in response to the plurality of pulses after the light has been attenuated by a body tissue, wherein the front end channel circuit comprises a response time; and
wherein the one or more periods of the plurality of pulses are substantially shorter than the response time of the front end channel circuit.
1 Assignment
0 Petitions
Accused Products
Abstract
Systems and methods for providing power to a light source of a physiological system and for generating a desired signal. The physiological system may comprise a light drive circuit that may provide a digital signal to the light source of the physiological system. The digital signal may comprise a plurality of pulses. The plurality of pulses may include one or more features that may be adjustable to vary the power provided to the light source. For example, the pulses may have a varying width. The light drive circuit may be configured to provide power to the light source during each pulse of the plurality of pulses. The system may further comprise a front end circuit configured to receive the light generated by the light source in response to the plurality of pulses, where the light is attenuated by a body tissue of a patient. The front end circuit may comprise a response time. The at least one period of the plurality of pulses may be substantially shorter than the response time of the front end channel circuit.
-
Citations
21 Claims
-
1. A photoplethysmography (PPG) system, the system comprising:
-
a light drive circuit configured to provide a digital signal that provides power to a light source, the digital signal comprising a plurality of pulses, wherein at least one feature of the plurality of pulses is adjustable to vary the power provided to the light source, the light drive circuit being further configured to provide power to the light source during each pulse of the plurality of pulses, and wherein the plurality of pulses comprises one or more periods; a front end channel circuit configured to receive light generated by the light source in response to the plurality of pulses after the light has been attenuated by a body tissue, wherein the front end channel circuit comprises a response time; and wherein the one or more periods of the plurality of pulses are substantially shorter than the response time of the front end channel circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A photoplethysmography (PPG) system, the system comprising:
-
a light drive configured to provide a digital signal that provides power to a light source, the digital signal comprising a plurality of pulses, the light drive being further configured to provide power to the light source during each pulse of the plurality of pulses; and a front end channel configured to receive pulses of light generated by the light source in response to the plurality of pulses of the digital signal, the pulses of light being attenuated by a body tissue, and wherein the front end channel is further configured to integrate the pulses of light to generate a desired analog pulse. - View Dependent Claims (13, 14)
-
-
15. A method for providing power to a light source of a photoplethysmography (PPG) device, the method comprising:
-
providing power to the light source according to a digital signal, the digital signal comprising a plurality of pulses, wherein at least one feature of the plurality of pulses is adjustable to vary the power provided to the light source, wherein the power is provided to the light source during each pulse of the plurality of pulses, and wherein the plurality of pulses comprises one or more periods; receiving, by a front end channel of the PPG device, light generated by the light source in response to the plurality of pulses after the light has been attenuated by a body tissue, wherein the front end channel comprises a response time, and wherein the one or more periods of the plurality of pulses are substantially shorter than the response time of the front end channel. - View Dependent Claims (16, 17)
-
-
18. A method for providing power to a light source of a photoplethysmography (PPG) device, the method comprising:
-
providing a digital signal that provides power to the light source, the signal comprising a plurality of pulses, wherein the power is provided to the light source during each pulse of the plurality of pulses; receiving, by a front end channel of the PPG device, pulses of light generated by the light source in response to the plurality of pulses of the digital signal, the pulses of light being attenuated by a body tissue; and integrating the pulses of light to generate a desired analog pulse. - View Dependent Claims (19, 20)
-
-
21-40. -40. (canceled)
Specification