Current suppression circuit and electronic device employing the same
AssigneeHon Hai Precision Industry Co., Ltd.
InventorCHUAN-TSAI HOU
Life of this patent
Estimating the term…
Abstract
A current suppression circuit for an electronic device and includes a main power supply and a standby power supply. The current suppression circuit includes a voltage comparator and an electronic switch. The voltage comparator includes a non-inverting input, an inverting input, and an output. The non-inverting input and the inverting input are respectively connected to the main power supply and the standby power supply, and the output is connected to the electronic switch. Whether the electronic switch is turned on or off by virtue of by the voltage comparator, such that when the electronic device itself is powered off, the comparator outputs a voltage signal to the electronic switch to turn it off, and the standby power supply is disconnected from the components.
Claims19
A current suppression circuit used in an electronic device including a main power supply and a standby power supply, the current suppression circuit comprising:
- a voltage comparator comprising:
- a non-inverting input electrically connected to the main power supply;
- an inverting input electrically connected to the standby power supply;
- and
- an output;
- and
- an electronic switch electrically connected to the output of the voltage comparator, wherein whether the electronic switch is turned on or off is controlled by the voltage comparator, such that when the electronic device is powered off, the output of the voltage comparator outputs a voltage signal to the electronic switch, and the electronic switch is switched off, and the standby power supply is disconnected from an electronic component.
An electronic device comprising:
- a first electronic component;
- a voltage insolating circuit electrically connected to the first electronic component;
- a standby power supply electrically connected between the voltage insolating circuit and the first electronic component;
- a second electronic component;
- a main power supply electrically connected to the voltage insolating circuit;
- and
- a current suppression circuit electrically connected between the voltage insolating circuit and the second electronic component, the current suppression circuit comprising:
- a voltage comparator comprising a non-inverting input, an inverting input, and an output, the non-inverting input and the inverting input electrically connected to the main power supply and the standby power supply respectively;
- and
- an electronic switch electrically connected to the output of the voltage comparator, wherein whether the electronic switch is switched on or off is under the control of the voltage comparator, such that when the electronic device is activated, the electronic switch is turned on, the first electronic component communicates with second electronic component, when the electronic device is powered off, the output of the comparator outputs a voltage signal to the electronic switch, and the electronic switch is switched off, and the standby power supply is disconnected from an electronic component.
Dependencies are inferred from the claim text.