Fan speed controlling system

Details Fan speed controlling system Fan speed controlling system

2008-01-29

2008-01-29

Masih, Karen (Department: 2837)

Electricity: motive power systems

Plural diverse motor controls

Running-speed control

C318S254100, C318S132000, C318S434000, C318S471000

Reexamination Certificate

active

11308942

ABSTRACT:
A fan speed controlling system for a power supply comprises a fan having two pins and a voltage comparator connected to the fan. The voltage comparator comprises a first input terminal for receiving a first reference voltage controlled by an external temperature of the power supply and a second input terminal for receiving a second reference voltage controlled by an interior temperature of the power supply. The voltage comparator outputs a higher voltage of the first and second reference voltage to the fan via the two pins.

REFERENCES:
patent: 4136822 (1979-01-01), Felter
patent: 5769705 (1998-06-01), O'Callaghan et al.
patent: 6247898 (2001-06-01), Henderson et al.
patent: 2005/0037256 (2005-02-01), Mukainakano

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