| 摘要 |
An output circuit includes a source follower constituted by a n-channel MOS transistor, having a drain connected to a power source and a source connected to an output terminal, and applying an output voltage to a load through the output terminal when a gate is charged, a voltage detector determining if the output voltage is at a first voltage or at a second voltage level, a first discharge circuit discharging the gate of the source follower according to an inputted turn-off signal when the output voltage is at the first voltage level, and stopping discharging the gate of the source follower when the output voltage decreases to the second voltage level and a second discharge circuit discharging the gate of the source follower more gradually than the first discharge circuit does according to the turn-off signal when the output voltage decreases from the first voltage to the second voltage level.
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