| 摘要 |
<p>A pulse circuit uses a transformer to convert a high current pulse at relatively low voltage into a very high voltage pulse which is able to directly drive a magnetron oscillator. The circuit forms part of a radar transmitter in which the transmitted pulse lengths are to be varied. It is not satisfactory to alter the structure of the transmitter or that of a pulse forming network which is used to feed the transformer when variation in the pulse length is required. The invention provides a bias circuit which magnetically biases the core material of the transformer, so that when a pulse is subsequently applied to the transformer it [the flux of the core material] saturates after a predetermined interval of time which is dependent on the bias level. In this way accurate control of pulse length can be achieved and the characteristics of the pulse forming network and the transformer are used to determine the rising and falling edges of microwave pulses generated by the magnetron. <IMAGE></p> |
