Line driver system
US4024501A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1975 |
| Grant date | May 17, 1977 |
| Priority date | — |
| Expiry date | Sep 3, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/26
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A line driver system for digital communication, using logic-level voltages, between an electronic transmitter-receiver device and an electronic receiver device, such as between a computer and a typewriter, a line printer or a cathode ray tube, has the transmitter-receiver device at a location remote from the receiver device. An output of the transmitter-receiver device is electronically coupled to an input of the receiver device using one line of a communications bus. This output of the transmitter-receiver device is coupled to that line of the bus through an optical isolator and then through a power booster. The receiver device has an output that provides a voltage signal when the receiver device is switched on-line. This voltage signal is provided at that output of the receiver device when the receiver device is capable of transforming digital information, that is provided at its input, to a readable form that is printed or displayed by the receiver device. This output of the receiver device is coupled through another optical isolator and through another power booster to a second line of the bus so that this second line of the bus receives a voltage signal when the receiver devic…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.