Electrical computers and digital processing systems: support – Computer power control – Power conservation
Reexamination Certificate
2008-04-15
2008-04-15
Du, Thuan (Department: 2116)
Electrical computers and digital processing systems: support
Computer power control
Power conservation
C713S310000
Reexamination Certificate
active
11066803
ABSTRACT:
A computer peripheral that can be connected to a host computer receives a power supply from the host computer. The computer peripheral includes: a USB connector1for connecting the computer peripheral to the host computer; a first circuit (FDD control IC2) which directly receives the power supply from the host computer via the USB connector1;and a second circuit (spindle motor driver6) which receives the power supply from the computer via the first circuit. The first circuit includes a pull-up circuit3for maintaining a higher voltage level than that of the second circuit and a switch32for turning ON/OFF the pull-up circuit3.The first circuit stops supplying the power supply from the first circuit to the second circuit via the switch32in the case where the first circuit receives a suspend signal from the host computer to become a standby mode.
REFERENCES:
patent: 5675813 (1997-10-01), Holmdahl
patent: 6256682 (2001-07-01), Gudan et al.
patent: 6671814 (2003-12-01), Kubo et al.
patent: 7032120 (2006-04-01), El-Kik et al.
Richard T. Vannoy II—“Pull-up Resistor”—Oct. 18, 1996—Google Groups: sci.electronics.basics.
Du Thuan
Mitsumi Electric Co. Ltd.
Patents&TMS, P.C.
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