Switchable multi-mode transceiver interface device
US5243623A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 25, 1990 |
| Grant date | Sep 7, 1993 |
| Priority date | — |
| Expiry date | Sep 25, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/018585
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A transceiver interface device in accordance with the present invention includes features which allow the transceiver to be switched for operation in either a differential or a single-ended mode. First, the output levels of the transceiver's differential line driver are switchable between TTL levels and non-TTL levels with small differential swings. Second, the transceiver's differential receiver is switchable between a differential threshold and a single-ended TTL threshold. Third, while in differential mode, both outputs of the driver may be placed in the high impedance state or active at the same time, but it is also possible to switch to a single-ended mode in which one driver output is in the high impedance state while the other can be switched between being active or being in the high impedance state. Fourth, the transceiver uses the SCSI standard DIFFSENS pin or driver enable signal for switching between differential mode and single-ended mode operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.