Voltage and current signaling
US8076988B2 · kind B2 · utility
2Cited by
7References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 27, 2009 |
| Grant date | Dec 13, 2011 |
| Priority date | — |
| Expiry date | Apr 29, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C3/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Circuitry and methods are provided. Voltage and current of an electrical load are detected, scaled and biased to derive respective voltage and current signals. Frequency-modulated signals corresponding to the voltage and current signals are respectively derived. The frequency-modulated signals are communicated between different electrical domains by way of optical isolation barriers. The frequency-modulated signals are processed to improve linearity and to time-correlate the signals to discrete samplings of the load voltage and current. Control of a printer or other device is performed using the processed signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.