I/O module for a serial multiplex data system with a programmable input voltage level selector
US5870401A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1995 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Nov 30, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/4026
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A programmable data link module is used on a time division multiplex data bus. The module receives data from the data bus during a selected time slot for a selected number of frames. The data link module includes an input circuit for generating a data output signal data to the data bus in response to input signals from an input device coupled to the module. The input circuit includes a programmable input voltage level selector, allowing different voltage rated input devices to be used with the data link module. A hysteresis circuit sets a minimum voltage level threshold representative of the input device being in one logic state and a maximum voltage level threshold representative of the input device being in another logic state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.