OUTPUT CIRCUIT AND METHOD OF DETECTING WHETHER LOAD CONNECTED TO CONNECTING PORT AND RELATED VIDEO OUTPUT CIRCUIT
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United States of America Patent
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Issued Date -
Mar 12, 2015
app pub date -
Jan 15, 2014
filing date -
Sep 6, 2013
priority date (Note) -
Abandoned
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Abstract
Described in example embodiments herein are techniques for detecting a connection between a load and a connecting port. In accordance with an example embodiment, an output circuit is able to detect a corresponding connecting port includes a voltage output stage, a reference current source and a determination circuit. The voltage output stage is arranged to output a voltage signal to an output end of the output circuit. The reference current source is arranged to selectively provide a first current to the output end. The determination circuit is arranged to generate a determination signal according to whether a second voltage signal is identical to a first voltage signal that is caused by the first current flowing into the output end. The determination signal indicates the load is connected to the connecting port when the second voltage signal is not identical to the first voltage signal.
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