Power device driver circuit
AssigneeTripath Technology, Inc.
InventorDonald T. Wile
Life of this patent
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Abstract
Circuits and techniques are described for compensating for a first parasitic current corresponding to a first parasitic capacitance associated with a first switch. A second switch is configured substantially the same as the first switch, the second switch having a second parasitic capacitance associated therewith. A current mirror coupled to the second switch generates a compensating current in response to a second parasitic current corresponding to the second parasitic capacitance. The compensating current compensates for at least a portion of the first parasitic current.
Claims8
A circuit for compensating for a first parasitic current corresponding to a first parasitic capacitance associated with a first switch, comprising:
- a second switch configured substantially the same as the first switch, the second switch having a second parasitic capacitance associated therewith;
- and
- a current mirror coupled to the second switch for generating a compensating current in response to a second parasitic current corresponding to the second parasitic capacitance, the compensating current compensating for at least a portion of the first parasitic current.
A circuit, comprising:
- a half-bridge circuit comprising a high side device and a low side device;
- and
- a driver circuit for driving the high side device, the driver circuit comprising,
- an input switch for receiving an input signal, the input switch having a first parasitic capacitance associated therewith, the first parasitic capacitance corresponding to a first parasitic current;
- a latch coupled to the input switch for providing drive to the high side device;
- a compensation switch configured substantially the same as the input switch, the compensation switch having a second parasitic capacitance associated therewith;
- and
- a current mirror coupled to the compensation switch for generating a compensating current in response to a second parasitic current corresponding to the second parasitic capacitance, the compensating current compensating for at least a portion of the first parasitic current.
Dependencies are inferred from the claim text.