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US 2003/0117817 A1Published application
Switch control circuit
AssigneeGoodrich Control Systems Limited
InventorsSimon Turvey, Adrian Shipley
Life of this patent
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Abstract
A switching circuit controls at least one semiconductor switch TR1 using drive signals generated from logic circuitry 4 that generates complementary drive signals on an upper and lower drive path. Validation circuitry is provided between the logic circuitry and the semiconductor switch that inhibits any uncontrolled switching of the semiconductor switch TR1 due to noise, such as lightning strike, appearing at the load.
Claims11
A control circuit for at least one first semiconductor device, the circuit comprising:
- a rectifier circuit having first and second inputs and arranged to generate a control signal for the at least one first semiconductor device when the first and second inputs are driven in anti phase;
- and
- a validation circuit coupled to said rectifier circuit and the or each first semiconductor device, and in which said validation circuit is arranged to inhibit uncontrolled switching of the or each first semiconductor device in the presence of noise.
Dependencies are inferred from the claim text.