| 摘要 |
PURPOSE:To improve the mounting density and the accuracy of an overload preventing circuit by employing an IC memory to perform the selective digital control. CONSTITUTION:A digital switch 32 will assign the address to read out the allowable load data of selected X-ray tube device from a pre-stored ROM35. The output from said switch 32 is binary coded by an encoder 33 and feed to the address assignment terminal of ROM35. While the photographying time information set by a photographying time setter 10 is binary encoded 34 and feed into ROM35. The allowable load read-out from ROM35 is fed through D/A converter 36 and a buffer amplifier 37 to a divider 37. The output from the divided 38 is compared with the output from an allowable load setter 39 by a comparator 16 to operate a relay 15 thus to prevent the overload of the X-ray tube. |
