| 摘要 |
<p>A spark-gap switch circuit comprises a spark-gap switch 12 comprising first and second electrodes 12a, 12c defining a spark gap. A trigger electrode 12b is positioned between the first and second electrodes. A charge storing device 11a is arranged in parallel with the spark-gap switch and is arranged for discharging across the spark gap to deliver energy to a load 13. The circuit is arranged to operate in a first phase during which the charge storing device is progressively charged such that the potential difference across both the charge storing device and the spark-gap switch progressively increases. During this first phase, the potential of the trigger electrode also progressively increases so as to avoid premature triggering of a spark between the trigger electrode and either of the first and second electrodes (12a, 12c). The circuit is also arranged to operate in a second phase, after the charge storing device is sufficiently charged to be able to discharge across the spark gap when triggered, during which the potential of the trigger electrode is progressively further increased. As such, initial triggering of the spark gap switch may be achieved using smaller trigger components (e.g. trigger pulse generator 15) than previously possible.</p> |
