| 摘要 |
An amplifier circuit having low-voltage transistors and being configured to operate at a high voltage level is provided. The amplifier circuit includes a driver circuit having a first stage and a second stage connected in series between a power supply and a ground. The driver circuit has a control terminal for receiving a signal for controlling a current flow in the output driver. The amplifier circuit also includes a switch transistor having a drain connected to the power supply, a source connected to the control terminal of the output driver, and a gate. A bias circuit is coupled to the switch transistor. In a first mode of operation, the bias circuit is adapted to turn off the switch transistor, and, in a second mode of operation, the bias circuit is adapted to turn on the switch transistor. The bias circuit is adapted to maintain a gate-to-drain voltage of the switch transistor within a predetermined voltage range.
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