Electromagnetic safety enhancement circuit for universal serial bus systems
US6101076A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1998 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | Oct 23, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/0793
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electromagnetic safety (EMS) enhancement circuit is provided for a USB (Universal Serial Bus) system, which can simulate an unplugging and replugging action so as to ensure continuous operation of the USB device after being disconnected from the USB interface due to electromagnetic interferences. The EMS enhancement circuit utilizes an EMS detection unit to detect the EMS condition of the data communication between the USB device and the USB interface; if abnormal, the EMS detection unit will output an overflow signal to a resume-control unit. The resume-control unit can output a pull-up control signal to a voltage pull-up circuit so as to control the voltage pull-up circuit in such a manner that, when the USB device is disconnected from the USB interface, the voltage pull-up circuit is first inhibited from outputting a voltage signal to one data line of the USB interface to thereby simulate an unplugging action and, after a preset time, be enabled again to output the voltage signal to thereby simulate a replugging action. The simulated unplugging and replugging action can then automatically reconnect the USB device to the USB interface for continuous operation of the USB device…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.