System and methods for constructing a noise replica
US9294139B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2014 |
| Grant date | Mar 22, 2016 |
| Priority date | — |
| Expiry date | Nov 13, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/123
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A data acquisition system and a method of operating the data acquisition system are disclosed. A zero crossing detector generates a mains cycle start signal in accordance with a power line frequency of a mains power source. An analog-to-digital converter samples a signal provided by a test probe and generates data samples at a sampling rate. A noise replica generator generates noise replicas from the data samples at a replica generation rate, and noise estimates from the noise replicas at the sampling rate, wherein the noise replica generation rate is less than the sampling frequency. A noise removal module removes each noise estimate from a corresponding data sample.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.