Pass-through and isolation switch
US4974190A · kind A · utility
19Cited by
7References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1988 |
| Grant date | Nov 27, 1990 |
| Priority date | — |
| Expiry date | Dec 5, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L49/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A pass-through and isolation switch for connecting a terminal to a computer and for disconnecting the terminal from the computer without disrupting any sessions which may have been opened on the computer by the terminal. The switch includes a first gate and a second gate for switching in and out balanced termination loads across corresponding input terminals of the switch depending on the state of a control signal. And it includes a third gate and a fourth gate for preventing or allowing the passage of signals between the terminal and the computer, also depending upon the state of the control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.