High-speed hybrid transmission interface

Details High-speed hybrid transmission interface High-speed hybrid transmission interface

1991-07-11

1993-10-26

Kuntz, Curtis

Pulse or digital communications

Repeaters

Testing

375 8, 375121, 340310CP, H04L 2910

Patent

active

052572897

ABSTRACT:
A high-speed long-line data interface is provided which employs two pre-configured parallel connectors coupled by four lines. One connector is a convert/transmit connector and the other is an unconvert/receive connector. Each connector includes a processor which buffers incoming data. The four lines include an RS-422 pair of differential transmission lines, an RS-232 status line and a ground line. Incoming parallel data is converted to serial format, then transmitted over the differential transmission lines to the unconvert/receive connector. The serial data then is unconverted back to parallel format and output to the peripheral device. Status information is sent from the peripheral to the host computer over the status line as a multi-byte pulse encoded signal. Power for the convert/transmit connector is derived parasitically from the unconvert/receive connector via the status line. Storage capacitors store charge from the status line for driving the connector during a status transmission. The convert/transmit connector self-paces its power consumption. A voltage level sensor is included for monitoring the voltage level of the parasitically-derived power signal. If the voltage goes below a threshold level (i.e., 4.5 volts), then data transmission is delayed for a programmable time period.

REFERENCES:
patent: 4627073 (1986-12-01), Shepperd et al.
patent: 4764939 (1988-08-01), Rogers
patent: 4884287 (1989-11-01), Jones et al.

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