Nuray Technology Co., Ltd

Yangwei Zhan

Huaping Tang

Zhanfeng Qin

Jinsong Pan

Xiangyu Yin

Qinghui Zhang

A power supply circuit and a field emission electron source are provided. The power supply circuit includes: field effect transistors Scoupled in series via drains and sources in sequence, wherein 1≤i≤n, n≥2, and wherein a source of Sis coupled to a negative electrode of a voltage source, and a drain of Sis used as an output terminal of the power supply circuit to couple to a load; a first group of diodes Dcoupled in series; a first group of resistors R, 2≤j≤n; and a current feedback module configured to adjust an internal resistance of the field effect transistors S, coupled in series in sequence, so as to cause a current passing through the load to be constant; wherein the field effect transistors S, 1≤i≤n, operate in a constant current region.

Power supply circuit and field emission electron source

A power supply circuit and a field emission electron source are provided. The power supply circuit includes: field effect transistors Scoupled in series via drains and sources in sequence, 1&#x2264;i&#x2264;n, i and n are natural numbers, n&#x2265;2, and a source of Sis coupled to a negative electrode of a voltage source, and a drain of Sis used as an output terminal of the power supply circuit to couple to a load; a first group of diodes Dcoupled in series; a first group of resistors R, 2&#x2264;j&#x2264;n, and i and j are natural numbers; and a voltage control module configured to adjust an output voltage of the voltage source to cause a current passing through the load to be constant; the field effect transistors S, 1&#x2264;i&#x2264;n, operate in a resistive region.

Constant current-controlled power supply circuit and field emission electron source

A time-division multiplexing control device applied to a distributed X-ray source includes: a first switch module with a number of first switches that receive a high-voltage signal and a first control signal, selectively turning on one of the plurality of first switches according to the first control signal and sending the high-voltage signal through the first switch turned on; and a cathode control module including a plurality of cathode control stages in one-to-one correspondence with the plurality of first switches, used for receiving the high-voltage signal from the first switch module and sending working state data through a cathode control stage corresponding to the first switch turned on in the plurality of cathode control stages, where each cathode control stage includes a cathode control unit and a cathode.

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Jiangsu, China

Yangwei Zhan