Protective circuit for a signal output stage in event of faulty contacting of electrical connections
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United States of America Patent
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Feb 19, 2019
Grant Date -
Feb 18, 2016
app pub date -
Apr 10, 2014
filing date -
Apr 11, 2013
priority date (Note) -
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Abstract
A protective circuit for protecting an output stage in the event of faulty contacting of the electrical connections, wherein the output stage includes a driver unit and has an analog or digital signal output is provided. Accordingly, in order to protect the output stage from a faulty connection in a simple and economical manner, the protective circuit comprises a first transistor circuit, which is connected in series between the output stage and the signal output, and a second transistor circuit, which is connected in series between the negative supply connection and the signal output. The second transistor circuit is connected to the base of the first transistor circuit in order to influence the first transistor circuit in such a way that the first transistor circuit becomes highly resistive in the event of a fault.
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