High-speed digital data communication system
US4941153A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1987 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Aug 25, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/02
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
According to the invention, a high-speed digital data communication system employs current mode circuitry as input and output devices at the ends of a transmission line, such as the interconnections between integrated circuit chips. Specifically, a current mode driver switch generates output current amplitudes responsive to a source of a digital signal representative of data to be transmitted. The switch output is connected to the input of a transmission line. The output of the transmission line is connected to the input of a receiving circuit that responds to the current amplitudes and has an input at an approximately constant voltage level. The receiving circuit is a transistor connected in a common base configuration. The emitter of the transistor is connected to the output of the transmission line. The base of the transistor is connected to a constant voltage source. A pulse shaper in the form of a Schmitt trigger has positive feedback from output to input. The described current mode circuitry is incorporated into an integrated circuit chip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.