| 摘要 |
The operation of radiography apparatus requires a control system to ensure that the product of the intensity of the tube current with its operating time is constant. This system, employing an electronic circuit, ensures that this product is constant for a wide range of current intensities. A condenser is charged by the voltage produced across a resistance by the operating current. This voltage is corrected according to the intensity of the current by a circuit containing a transistor, which applies a correction during the use of current intensities of 100 milliamperes. |
