| 摘要 |
A depletion mode transistor serving as a start-up control element is provided. The depletion mode transistor includes a first depletion mode junction transistor and a second depletion mode transistor. The first depletion mode junction transistor includes a source and a drain, one of which is coupled to a voltage supply source, and a gate electrically coupled to ground. The second depletion mode transistor includes a source and a drain, one of which is coupled to the other one of the source and the drain of the first depletion mode junction transistor, and a gate being controllable to turn OFF the second depletion mode transistor.
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