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The control device of the filament, the filament utilization processor and control method 发明授权

2023-09-20 4210 168K 0

专利信息

申请日期 2025-07-10 申请号 JP2005207014
公开(公告)号 JP4518328B2 公开(公告)日 2010-08-04
公开国别 JP 申请人省市代码 全国
申请人 Sharp5049
简介 PROBLEM TO BE SOLVED : To stably control quantity of thermion emitted from a filament in high precision. ŽSOLUTION : A filament controller 10 comprises a resistance measuring means 1 to measure resistance value of a filament 5, an average resistance value computing unit 2 to compute the average resistance value Rave in a first period, a current target value computing unit 3 to compute the current target value Iref to be supplied to the filament 5 based on the average resistance value Rave and power target value Wref, a constant current power source 4 to control the current value flowing through the filament 5 so that it may match the current target value Iref in a second period after the first period, and a timing control circuit 6 to control timing of the first period and the second period. ŽCOPYRIGHT : (C)2007, JPO&INPIT Ž


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