Signalling circuit, processing device and safety critical system
US8957702B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2011 |
| Grant date | Feb 17, 2015 |
| Priority date | — |
| Expiry date | Aug 1, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/017509
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A signalling circuit for a signal channel of a communication network comprises a communication network terminal connectable to the signal channel and to a voltage supply; an input terminal connectable to receive a transmit signal; a driver device comprising a first driver terminal connected to the communication network terminal, a second driver terminal connected to ground, and a driver control terminal connected to the input terminal; wherein the driver device is arranged to connect the communication network terminal to ground in response to a transition from a low to a high voltage driver control signal state of a driver control signal received at the driver control terminal. And the signalling circuit comprises a feedback circuit connected to the first driver terminal and the driver control terminal and comprising a capacitive device; and a pull-down device arranged to connect the driver control terminal to ground after a predefined delay after a transition of the transmit signal from a low to a high voltage transmit signal state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.