Device and method for pre-bootup fault control of a driver output

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United States of America Patent

PATENT NO 11537114
APP PUB NO 20220276646A1
SERIAL NO

17188908

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Abstract

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Example implementations include a method of pre-bootup fault monitor of a LASER diode driver output, by applying a first power to a pre-bootup fault monitor device, setting a fault condition at the pre-bootup fault monitor device to a no-fault state, initiating the pre-bootup fault monitor device, determining whether a first impedance of driver output satisfies an impedance threshold, and in response to a determination that the first impedance satisfies the impedance threshold, applying a second power to the output device. Example implementations also include a system with a LASER output device, and a pre-bootup fault monitor device operatively coupled to the LASER output device, and operable to activate in response to receiving a first power, set a fault condition to a no-fault state, determine whether a first impedance of the output driver satisfies an impedance threshold, and, in response to a determination that the first impedance satisfies the impedance threshold, apply a second power to the LASER output device, and a power-on reset controller operatively coupled to the pre-bootup fault monitor and operable to, in response to the determination that the first impedance satisfies the impedance threshold, deactivate the pre-bootup fault monitor.

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Patent Owner(s)

Patent OwnerAddress
RENESAS ELECTRONICS AMERICA INCMILPITAS CA

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chandrasekaran, Muthukumaran San Jose, US 5 2
Cole, Matthew Los Altos, US 13 48
Concklin, Barry San Jose, US 7 57
Kumath, Lokesh Fremont, US 5 5
Liu, Bin Santa Clara, US 1027 7414
Vu, Ha Chu San Jose, US 12 134

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