| 摘要 |
<p>A high frequency power supply (28) for applying electrical energy to a target site on or within a patient's body in the presence of electrically conductive fluid. In one embodiment, the power supply (28) includes an electrical output driver (342), an output current sensor (302) detecting the current output from the driver, and a power limiting device (330) coupled to the current sensor. During normal conditions the power limiting device (330) operates on a continuous basis. When current output exceeds a predetermined threshold level, the power limiting device (330) is adapted to reduce power on the ouput driver to a standby mode. The power limiting device (330) operates on a periodic detection or duty cycle when in the standby mode. The power limiting device (330) switches into the standby mode to prevent excessive power drains.</p> |
