公开(公告)号：US3794878A

公开(公告)日：1974-02-26

申请号：US3794878D

申请日：1972-12-11

Applicant: FORD MOTOR CO

Inventor： SICKAFUS E

IPC: G01R13/26 ,  H01J3/02 ,  H01J29/52 ,  H04N5/68

CPC classification number: G01R13/26 ,  H01J3/02 ,  H01J29/52 ,  H04N5/68

Abstract: A resistor connected between the filament and a filament can of an electron beam device also is connected to an auxiliary operational amplifier that establishes and controls an auxiliary current through the resistor. The operational amplifier can be connected to maintain a constant current through the resistor or a constant potential difference across the resistor despite wide variations in the potential of the filament power supply, the electron producing ability of the filament, or other operational disturbances. In addition, the operational amplifier can be programmed to produce predetermined variations in the quantity of electrons making up the electron beam with a much wider band width.

Abstract translation: 连接在灯丝和电子束装置的灯丝壳之间的电阻器也连接到辅助运算放大器，其建立并控制通过电阻器的辅助电流。 可以连接运算放大器，以保持恒定电流通过电阻器或电阻器上的恒定电位差，尽管灯丝电源的电位，灯丝的电子产生能力或其他操作干扰的电位有很大变化。 此外，运算放大器可被编程为产生具有更宽带宽的电子束的电子数量的预定变化。