Boots – shoes – and leggings
Patent
1991-07-26
1993-10-26
Eng, David Y.
Boots, shoes, and leggings
36492793, 3649352, 3649355, 3642399, G06F 300, G06F 314
Patent
active
052573907
ABSTRACT:
This invention is an extended range communications link having a first signal conditioning network located near and coupled to a computer. The network conditions keyboard clock, keyboard data, logic ground, mouse clock, mouse data, R, G, and B analog video signals, and multiplexes HS and VS sync signals. Conditioning of the video signals includes reducing their amplitude so the video signals do not significantly cause induced crosstalk in conductors adjacent to the video conductors. An extended range cable up to about 800 feet in length and having a plurality of conductors is coupled to a signal conditioning circuit and conveys the conditioned, above-named signals, in addition to power and logic ground potentials, to a second signal conditioning network. The network restores the analog video signals to their original levels by discrete video amplifiers having constant current characteristics that do not cause power fluctuations to occur in the power conductors of the cable, also reducing induced noise. Additionally, the signal conditioning network demultiplexes the sync signals and further conditions the mouse and keyboard signals and the power and ground potentials prior to inputting the signals to the keyboard, mouse, and monitor.
REFERENCES:
patent: 4665501 (1987-05-01), Saldin et al.
patent: 4885718 (1989-12-01), Asprey
patent: 4907146 (1990-03-01), Caporali
patent: 5040111 (1991-08-01), Al-Salameth et al.
patent: 5193200 (1993-03-01), Asprey
Cybex Corporation
Eng David Y.
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