| 摘要 |
Inverter-rectifier combinations of the type which include at least a pair of transistors for alternately applying DC current to a transformer to generate alternating voltage from a DC source, and a digital semiconductor type driving means for alternately providing voltage pulses of given duration and at a periodic repetition rate at each of two outputs for controlling such alternating operation of the transistors is improved in a combination containing a protective circuit located in between the driving circuit and the inputs to the inverter transistors. The protective circuit contains first and second inputs and corresponding first and second outputs with the inputs being connected to an associated one of the two driving means outputs, and the outputs being connected to an associated one of the two inverter transistors; cross-gating means, including linear semiconductor switch means, for producing a driving output pulse on a one of the outputs responsive to the presence of a voltage pulse at an associated one of said inputs and only during the absence of a voltage pulse at the other one of said inputs; and delay means for inhibiting the application of said driving output pulse at a one of said circuit outputs until the lapse of a predetermined interval of time subsequent to the termination of application of a driving output pulse to the other one of said circuit outputs, the predetermined time interval being at least as great as the defined charge storage time of the inverter transistors and less than half the duration preferably of the pulses supplied by the digital control circuit; whereby the inverter transistors are not driven into overlapping operation.
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