Diode detection circuit
First Claim
1. A photoplethysmographic system for use in determining at least one data value corresponding with a photoplethysmographic sensor comprising:
- signal generation means for generating at least one interrogation signal in each of a first mode of operation and a second mode of operation;
sensor identifying means for receiving at least one interrogation signal, wherein an initial polarity of said interrogation signal is established at a first sensor terminal in said first mode of operation and an opposite polarity of said interrogation signal is established at the first terminal in said second mode of operation, and wherein said identifying means produces a first output in said first mode of operation and a second output in said second mode of operation; and
processor means for employing said first and second outputs to determine at least a first data value corresponding with said sensor.
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Accused Products
Abstract
A photoplethysmographic system and method is provided to identify compatible sensors to monitors and/or for determining sensor attributes. The improved system includes a signal generation means for providing an interrogation signal, an identifying means coupled between a first and second sensor terminal operable to produce multiple outputs upon application of the interrogation signal in two modes of operation, and a processor to interpret the outputs. When the interrogation signal is applied to a sensor terminal in a first mode, a first output is obtained. Upon applying the same interrogation signal to the sensor terminal in a second mode, a second output is obtained. The first and second outputs may then be utilized by the processor comprising, for example, a photoplethysmographic monitor to yield enhanced sensor information. The disclosed method may be carried out utilizing the inventive photoplethysmographic system.
6 Citations
34 Claims
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1. A photoplethysmographic system for use in determining at least one data value corresponding with a photoplethysmographic sensor comprising:
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signal generation means for generating at least one interrogation signal in each of a first mode of operation and a second mode of operation;
sensor identifying means for receiving at least one interrogation signal, wherein an initial polarity of said interrogation signal is established at a first sensor terminal in said first mode of operation and an opposite polarity of said interrogation signal is established at the first terminal in said second mode of operation, and wherein said identifying means produces a first output in said first mode of operation and a second output in said second mode of operation; and
processor means for employing said first and second outputs to determine at least a first data value corresponding with said sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method to determine at least one data value from a photoplethysmographic sensor comprising the steps of:
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applying an interrogation signal to a photoplethysmographic sensor with an identifying means between at least a first and second terminal, wherein a first output is obtained in a first mode of operation;
reversing the polarity of said interrogation signal, wherein a second output is obtained in a second mode of operation; and
employing said first and second outputs to determine at least one data value corresponding with said photoplethysmographic sensor. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification