Current sensing circuit adaptable to MOSFET circuits
AssigneeHimax Technologies Limited
InventorYaw-Guang Chang
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Abstract
A current sensing circuit includes an output driving transistor with an output node that provides an output voltage; a diode-connected first transistor connected between the output node and a current circuit; a second transistor and a third transistor connected in series, the second transistor having a gate connected to a gate of the output driving transistor, and the third transistor having a gate connected to a gate of the first transistor; and a current measuring circuit connected in series with the second transistor and the third transistor to measure a current flowing through the second transistor and the third transistor.
Claims17
A current sensing circuit adaptable to metal-oxide-semiconductor field-effect transistor (MOSFET) circuits, comprising:
- an output driving transistor with an output node that provides an output voltage;
- a diode-connected first transistor connected between the output node and a current circuit, the diode-connected first transistor having a gate and a drain tied together;
- a second transistor and a third transistor connected in series, the second transistor having a gate connected to a gate of the output driving transistor, and the third transistor having a gate connected to a gate of the first transistor;
- and
- a current measuring circuit connected in series with the second transistor and the third transistor to measure a current flowing through the second transistor and the third transistor.
Dependencies are inferred from the claim text.