| 摘要 |
<p>A driver is utilized at the output (10) of a digital word generator (9) for translating a digital word to selectable voltage levels in accordance with a particular unit (11) connected to the output of the driver and undergoing diagnostic testing. The driver has a separate control line (14) for switching the driver to a tri-state mode so that the input of a unit undergoing test may be switched to a high impedance input, thereby permitting tri-state diagnostic testing of a unit (11) undergoing test.</p> |
