Inverter driver for X-Ray generator.

摘要

In a square-wave, pulse-width-modulated transistor inverter, each of the transistors is provided with a driver network for turning the transistor on and off in response to control signals from a microprocessor. The microprocessor receives its command signals from both the operator input and a voltage feedback circuit. Positive and negative controlled d.c. voltage levels are provided by a switch-mode power supply with the positive voltage being applied to a turn-on circuit and the negative voltage being applied to a turn-off circuit. In response to control logic signals, the turn-on network provides a positive voltage signal to the base of the power transistor to turn it off, and the turn-off network provides a negative voltage to the transistor base to turn it off. A phase-advance network is included in the turn-off circuit and a pull-down inductive means is included in the turn-off circuit.