公开(公告)号：JP2003297258A

公开(公告)日：2003-10-17

申请号：JP2002096007

申请日：2002-03-29

Applicant: Nec Micro Hakan Kk ,  エヌイーシーマイクロ波管株式会社

Inventor： KOBAYASHI JUNICHI ,  TSUCHITANI TAKUICHI ,  MATSUOKA JUNICHI

IPC: H01J23/34 ,  H01J25/34 ,  H02H9/00 ,  H05B6/66

CPC classification number: H01J23/34

Abstract: PROBLEM TO BE SOLVED: To constitute a circuit with a few component parts, by which destroy of a microwave tube by being impressed with excessive voltage at the time of OFF of power source voltage is prevented, in an electric power device for the microwave tubes.
SOLUTION: Voltage between a helix power supply terminal and a cathode power supply terminal is divided in to the voltage that is a little lower than the voltage of a collector power supply terminal, and a unidirectional conducting means is provided between this divided point and the collector power supply terminal. If the voltage of the collector power supply terminal approaches the voltage of the cathode power supply terminal to become lower than the voltage of the divided point, this unidirectional conducting means conducts to clamp the voltage of the collector power supply terminal to the voltage almost equal to the voltage of the divided point. Since the voltage impressed on the both ends of the unidirectional conducting means is low, it is not necessary to connect many parts in series for securing breakdown of voltage, and it is possible to miniaturize the circuit.
COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：为了构成具有几个组成部分的电路，通过在电源电压OFF的OFF时，微波管被破坏而被阻止，在用于电源电压的电力装置中 微波管。 解决方案：螺旋电源端子和阴极电源端子之间的电压被分成比集电极电源端子的电压稍低的电压，并且在该分割点之间提供单向导通装置 和集电极电源端子。 如果集电极电源端子的电压接近阴极电源端子的电压，使其低于分压点的电压，则该单向导通装置将集电极电源端子的电压钳位到几乎等于 分压点的电压。 由于施加在单向导通装置的两端的电压低，因此不需要连接多个串联的部件以确保电压的击穿，并且可以使电路小型化。 版权所有（C）2004，JPO