Drive circuit of computer system for driving a mode indicator

Details Drive circuit of computer system for driving a mode indicator Drive circuit of computer system for driving a mode indicator

2005-12-19

2008-08-05

Ahmed, Samir A. (Department: 2624)

Electronic digital logic circuitry

Interface

Supply voltage level shifting

C326S083000, C326S084000, C326S089000, C326S124000, C326S126000, C326S127000

Reexamination Certificate

active

07408384

ABSTRACT:
A drive circuit of a computer system is for driving a mode indicator. The computer system includes a first port and a second port. The mode indicator includes a first receiving end and a second receiving end. The drive circuit includes a first input end connected to the first port, a second input end connected to the second port, a first output end connected to the first receiving end, a second output end connected to the second receiving end. A power supply is connected to the first input end and the second input end via a first resistor and a second resistor respectively. The mode indicator is dichromatic and has two LEDs emitting non-matching colored light.

REFERENCES:
patent: 4657670 (1987-04-01), Newton
patent: 7030773 (2006-04-01), Peterson et al.
patent: 7043855 (2006-05-01), Heilman et al.
patent: 2001/0010472 (2001-08-01), Kamiya
patent: 2005/0134191 (2005-06-01), Wong et al.
patent: 2006/0139064 (2006-06-01), Zhou et al.
patent: 2006/0256050 (2006-11-01), Ikeda
patent: 03236782.1 (2004-04-01), None

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