X-Ray diagnostic generator comprising switching means for switching-on and -off the high voltage transformer

摘要

In an exemplary embodiment, a circuit arrangement is present for the purpose of storage of information which corresponds to the switch-off phase angle of the supply voltage and for the purpose of switching-on at a phase position of the supply voltage which is equal to the respectively stored phase angle. In order to take into account the delay time between a switch-on signal and the actual switching-on of the high voltage transformer, two time systems are present, operating in relative displacement by the amount of the delay time, which time systems recognize the respective phase position of the supply voltage and cooperate with the memory as well as with a comparator, where the phase position present at the switch-off time is stored taking into account the delay time. The comparator delivers enabling signals for the switching-on of the high voltage transformer when the supply voltage reaches the switch-off-phase position which is pre-displaced by the amount of the delay time.