| 摘要 |
<p>PURPOSE: A signal output device and a test device are provided to switch high voltage by using an electric field effect transistor such as a switching device of low prices. CONSTITUTION: A switching circuit(14) of high voltage stage opens or makes the gap of a first terminal connected to a reference voltage generating port and a second terminal connected to a second terminal a short circuit. A switching circuit(16) of high voltage stage opens or makes a first terminal connected to the output port and a second terminal a short circuit. If the switching circuit of the low voltage state is a short circuit, a controller(18) opens the switching circuit of the high voltage stage, and if the switching circuit of the high voltage state is a short circuit, a controller opens the switching circuit of the high voltage.</p> |
