Analog-to-digital measurement and calibration system for electrical energy
US5736848A · kind A · utility
38Cited by
13References
27Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 29, 1995 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Aug 29, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R21/133
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for measuring the energy output from one or more electrical energy sources first makes an analog power measurement, and converts the resultant output into digital form. The A/D converter includes a sigma-delta modulator in series with a digital filter. Then, the output from the A/D converter is inputted to a digital quantizer via a serial interface. A programmable calibration value is also inputted into the digital quantizer from a computer via a non-volatile memory, such that the operating level/calibration of the digital quantizer is controllable by the computer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.