CONSTANT CURRENT REGULATOR
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United States of America Patent
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app pub date -
Jun 3, 2015
filing date -
Apr 12, 2012
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Abstract
A constant current regulator includes a first transistor having a first terminal coupled with an input voltage; a second transistor having a first terminal coupled with a control terminal of the first transistor; a third transistor having a first terminal coupled with the first terminal of the first transistor and having a control terminal coupled with the first terminal of the second transistor; a first resistor having a first terminal coupled with a second terminal of the third transistor and having a second terminal coupled with a control terminal of the second transistor; a second resistor having a first terminal coupled with the control terminal of the second transistor and having a second terminal coupled with a second terminal of the second transistor; and a third resistor having a first terminal coupled with the second terminal of the third transistor and having a second terminal coupled with a fixed-voltage terminal.
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