Electrical energy analyzer
US4978911A · kind A · utility
24Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1989 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Feb 23, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R21/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electrical energy analyzer including a computer for monitoring energy consumption and supporting ripple control is provided with improved A/D converter resolution by applying a 1/2 LSB square wave offset signal to the non-inverting input of a differential amplifier for amplifying a current shunt voltage. The amplifier output has limited filtering to allow a 1/2 to 1 LSB random signal to be applied to the measurement signal entering the A/D converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.