High-speed digital data communication system

Details High-speed digital data communication system High-speed digital data communication system

1987-08-25

1990-07-10

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

330255, 330289, H04B 350

Patent

active

049411535

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.

REFERENCES:
patent: 3105198 (1963-09-01), Higginbotham
patent: 3375457 (1968-03-01), Hollstein, Jr.
patent: 4326287 (1982-04-01), Abramson
patent: 4450571 (1984-05-01), Hirayama et al.
patent: 4607232 (1986-08-01), Gill, Jr.
patent: 4713827 (1987-12-01), Lauffer et al.
patent: 4736385 (1988-04-01), Pratt et al.
patent: 4755767 (1988-07-01), Yamatake

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