Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1988-04-01
1989-11-28
Griffin, Robert L.
Pulse or digital communications
Spread spectrum
Direct sequence
307110, 178 2B, 455343, H04L 2300
Patent
active
048842877
ABSTRACT:
A converter device for converting signals between an RS-232 device and an RS-422 device. The converter device can either be self-powered, using signals at the I/O port of the RS-232 device to derive its operating voltages, or can be powered by an external voltage source when the I/O signals are not of sufficient magnitude to derive the operating voltages or there are a large number of devices connected in parallel by the converter device.
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Amy Michael E.
Jones Ronald
Griffin Robert L.
Hawk Jr. Wilbert
Huseman Marianne
Jewett Stephen F.
NCR Corporation
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