Current controlled amplifier
AssigneeFlextronics AP, LLC
InventorAntony E. Brinlee
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Abstract
A circuit arrangement is disclosed for controlling the switching of a field effect transistor (FET). A current controlled amplifier may be configured to amplify a current in a current sense device to generate an amplified current, wherein the current in the current sense device indicates a current through the FET. A comparator may be coupled to the current sense amplifier to compare a voltage corresponding to the amplified current with a voltage reference and to generate a comparator output based on the comparison, wherein the comparator output controls whether the FET is on or off.
Claims20
A current-controlled amplifier (CCA) comprising:
- a modified Wilson current mirror including:
- a differential input configured to sense current flowing through a sense resistance that is coupled between the differential input;
- an output configured to sink an output current that is an amplified version of the sensed current;
- and a first transistor, wherein the output of the modified Wilson current mirror is coupled to first transistor, and wherein the first transistor is configured to source a CCA output current based on the output of the modified Wilson current mirror.
Dependencies are inferred from the claim text.