Controlling device for a heat-dissipating system
AssigneeDelta Electronics, Inc.
InventorShou-Te Yu
Life of this patent
Estimating the term…
Abstract
A controlling device adapted to be used for a heat-dissipating device. The controlling device includes a signal generator electrically connected between the heat-dissipating device and a power source supplying a voltage for the heat-dissipating device, and generating a control signal for switching on/off the power source, and a voltage regulator electrically connected between the heat-dissipating device and the power source and connected in parallel with the signal generator for continuously providing the heat-dissipating device with a basic voltage when the power source is switched off by the control signal so as to prevent that an output signal of an external device electrically connected with the heat-dissipating device is interfered with the control signal.
Claims21
A heat-dissipating system comprising:
- a power supply;
- a DC fan;
- a pulse width modulation circuit generating a pulse width modulation signal;
- a transistor having a drain connected to the power supply, a gate connected to receive the pulse width modulation signal and a source connected to the DC fan;
- a zener diode connected between the power supply and the DC fan;
- and
- an external device connected to the DC fan and generating an output signal;
- wherein the power supply provides a voltage to the DC fan through the zener diode when the transistor is turned off by the pulse width modulation signal, which prevents the output signal of the external device from interference.
A heat-dissipating system comprising:
- a power supply;
- a DC fan;
- a pulse width modulation circuit generating a pulse width modulation signal;
- a transistor having a drain connected to the power supply, a gate connected to receive the pulse width modulation signal and a source connected to the DC fan;
- a resistor connected between the power supply and the DC fan;
- and
- an external device connected to the DC fan and generating an output signal;
- wherein the power supply provides a voltage to the DC fan through the resistor when the transistor is turned off by the pulse width modulation signal, which prevents the output signal of the external device from interference.
A controlling device adapted to be used for a heat-dissipating device, comprising:
- a signal generator electrically connected between said heat-dissipating device and a power source supplying a voltage for said heat-dissipating device, and generating a control signal for switching on/off said power source;
- and
- a voltage regulator electrically connected between said heat-dissipating device and said power source and connected in parallel with said signal generator for continuously providing said heat-dissipating device with a basic voltage when said power source is switched off by said control signal so as to prevent that an output signal of an external device electrically connected with said heat-dissipating device is interfered with said control signal.
Dependencies are inferred from the claim text.