Fieldbus transmitter interface, fieldbus receiver interface and system with both interfaces and coding method for a fieldbus transmitter interface
US11442496B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 2021 |
| Grant date | Sep 13, 2022 |
| Priority date | — |
| Expiry date | Mar 30, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P90/02
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Disclosed is a fieldbus transmitter interface for a field device or a control center. The fieldbus transmitter interface comprises a computing unit, a digital gate, an analog transmission filter and a transmitter interface output. The computing unit is connected to the digital gate, and the digital gate is connected to the analog transmission filter, and the analog transmission filter is connected to the transmitter interface output. The computing unit comprises a pulse width modulator and a pulse width modulator clock that is suitable for generating a secondary signal coded by a duty cycle which is varied over time by the pulse width modulator clock. The pulse width modulator superimposes the secondary signal with a carrier signal, so that a digital transmission signal with a frequency of less than 150 kHz is generated. The digital gate and the analog transmit filter convert the digital transmission signal into an analog loop signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.