Power supply circuit and field emission electron source
US12149170B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2020 |
| Grant date | Nov 19, 2024 |
| Priority date | — |
| Expiry date | Aug 23, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2235/062
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply circuit and a field emission electron source are provided. The power supply circuit includes: field effect transistors Si coupled in series via drains and sources in sequence, wherein 1≤i≤n, n≥2, and wherein a source of S1 is coupled to a negative electrode of a voltage source, and a drain of Sn is used as an output terminal of the power supply circuit to couple to a load; a first group of diodes D1i coupled in series; a first group of resistors R1j, 2≤j≤n; and a current feedback module configured to adjust an internal resistance of the field effect transistors Si, coupled in series in sequence, so as to cause a current passing through the load to be constant; wherein the field effect transistors Si, 1≤i≤n, operate in a constant current region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.