Thermal control variable-speed circuit without switching noise

Details Thermal control variable-speed circuit without switching noise Thermal control variable-speed circuit without switching noise

2008-07-01

2008-07-01

Duda, Rina I (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Speed or rate-of-movement

C318S471000, C318S456000, C388S934000

Reexamination Certificate

active

07394215

ABSTRACT:
A thermal control variable-speed circuit without switching noise is connected with a driving circuit, which controls the rotation speed of a fan motor using a driving voltage. The thermal control variable-speed circuit includes a reference voltage output circuit and a driving voltage control circuit. The reference voltage output circuit outputs a corresponding reference voltage signal according to ambient temperature changes. The reference voltage output circuit has one end connected to a first resistor in series and to a second resistor in parallel. The driving voltage control circuit outputs a corresponding driving voltage according to the magnitude of the reference voltage signal.

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