Standard capacitance box output device
US9208944B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Oct 26, 2011 |
| Grant date | Dec 8, 2015 |
| Priority date | — |
| Expiry date | Mar 18, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention discloses a capacitance standard box output device. The number of standard capacitors is reduced, so that the structure of a changeover switch is simplified, and the number of connection wires is reduced, so as to improve the shield effect and reduce uncertainty. The technical proposal of the invention is as follows: The capacitance standard box output device comprises a changeover switch and precision capacitors, wherein the changeover switch is placed in a shield box; the shield box has an input terminal and an output terminal; the input terminal is connected to the changeover switch and the precision capacitor; the output is connected to the changeover switch and outputs the capacitance selected by the changeover switch; the selected capacitance is a product of a unit capacitance and an arbitrary integer value between 0 and 10; the number of the precision capacitors is from 4 to 9, and at least one capacitor is of a unit capacitance. The invention is mainly used for the capacitance standard box to output more accurate capacitance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.