Over-current protection in linear regulators
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United States of America Patent
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Feb 3, 2009
Grant Date -
Feb 1, 2007
app pub date -
Oct 7, 2005
filing date -
Jul 29, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An integrated circuit radio transceiver and method therefor includes a linear regulator an output transistor for producing a current into an output node of the regulator wherein an amplification block is operable to produce a bias signal to a gate terminal of the output transistor to operably bias the output transistor to produce the current into the output node of the regulator. A current steering amplification block is operably disposed to steer current in/out of the gate of the output transistor (depending on device type) based upon the current being conducted through the output node of the regulator exceeding a specified threshold. The current steering amplification block further includes a current sinking element operably disposed to sink a specified amount of current to define the specified threshold.
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