LED forward voltage estimation in pulse oximeter

United States of America Patent

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Oct 10, 2006
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Aug 25, 2005
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Feb 25, 2004
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Feb 25, 2004

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Abstract

An apparatus and method for determining if a forward voltage of an LED in a pulse oximeter is within a predetermined range. This is accomplished by measuring the current through the LED, and also by knowing the duty cycle of the pulse width modulator (PWM) drive signal to the LED.

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COVIDIEN LP	15 HAMPSHIRE STREET MANSFIELD MA 02048

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A61B:DIAGNOSIS; SURGERY; IDENTIFICATION

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Inventor Name	Address	# of filed Patents	Total Citations
Chew, Bradford B	San Ramon, CA	20	1406
Peterson, Ethan	Castro Valley, CA	5	191
Shea, William	Livermore, CA	48	1696

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LED forward voltage estimation in pulse oximeter

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United States of America Patent

10788243

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PATENT NO	7120480
APP PUB NO	20050187450A1
SERIAL NO	10788243
DOCKET NO

US Family Size	Non-US Coverage
Patent Longevity	Forward Citations

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
October 10, 2006	US,7120480,B2 US7120480B2	GRANTED PATENT AS SECOND PUBLICATION
August 25, 2005	US,20050187450,A1 US20050187450A1	FIRST PUBLISHED PATENT APPLICATION

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10788243

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