| 摘要 |
A method of and a circuit for temperature protecting a transistor (4) comprising: a controlled voltage supply (34) for applying to the transistor a first voltage substantially less than a predetermined voltage required to render the transistor conductive at normal temperature; a detector (8, 12, 18) for detecting whether the transistor conducts in response to the applied first voltage; and a controlled voltage supply (46), responsive to not detecting conduction of the transistor, for enabling the transistor by applying thereto a second voltage at least equal to the predetermined voltage, and, responsive to detecting conduction of the transistor, for disabling the transistor by removing the first voltage therefrom and inhibiting the application of the second voltage thereto so as to prevent damage thereto.
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