Overvoltage protection circuit

Universal Serial Bus (USB) protection circuits are provided. A circuit includes a plurality of first transistors connected in series between a pad and ground. The circuit also includes a plurality of second transistors connected in series between the pad and a supply voltage. The circuit further inc...

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Bibliographic Details
Main Author Dreps, Daniel M
Format Patent
LanguageEnglish
Published 09.03.2021
Subjects
BASIC ELECTRONIC CIRCUITRY
CALCULATING
CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS
COMPUTING
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
PHYSICS
PRINTED CIRCUITS
PULSE TECHNIQUE
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Summary:Universal Serial Bus (USB) protection circuits are provided. A circuit includes a plurality of first transistors connected in series between a pad and ground. The circuit also includes a plurality of second transistors connected in series between the pad and a supply voltage. The circuit further includes a control circuit that applies respective bias voltages to each one of the plurality of first transistors and to each one of the plurality of second transistors. The bias voltages are configured to: turn off the plurality of first transistors and turn off the plurality of second transistors when a pad voltage of the pad is within a nominal voltage range; sequentially turn on the plurality of first transistors when the pad voltage increases above the nominal voltage range; and sequentially turn on the plurality of second transistors when the pad voltage decreases below the nominal voltage range.
Bibliography:Application Number: US201816167898