Power detecting circuit with fast power removing detection, electronic device and method thereof
First Claim
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1. A power detecting circuit with fast power removing detection, comprising:
- an isolating device, coupled between an external power source and an internal power source, for isolating the external power source and the internal power source; and
a comparator, coupled to the external power source, for determining if the external power source is removed, and accordingly generating a removing signal;
wherein the internal power source is provided to an internal circuit;
wherein the comparator is coupled to the internal circuit;
wherein the internal circuit prepares to turn off and turns off according to the removing signal.
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Abstract
A power detecting circuit with fast power removing detection is disclosed. The power detecting circuit comprises an isolating device, coupled between an external power source and an internal power source, for isolating the external power source, and the internal power source, and a comparator, coupled to the external power source, for determining if the external power source is removed, and accordingly generating a removing signal.
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Citations
22 Claims
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1. A power detecting circuit with fast power removing detection, comprising:
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an isolating device, coupled between an external power source and an internal power source, for isolating the external power source and the internal power source; and a comparator, coupled to the external power source, for determining if the external power source is removed, and accordingly generating a removing signal; wherein the internal power source is provided to an internal circuit; wherein the comparator is coupled to the internal circuit; wherein the internal circuit prepares to turn off and turns off according to the removing signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electronic device with fast power removing detection, comprising:
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an internal power source, for receiving an external power source for accordingly providing power; an internal circuit, coupled to the internal power source for receiving the power provided by the internal power source, to operate, prepare to turn off and turn off according to a removing signal; and a power detecting circuit, comprising; an isolating device, coupled between the external power source and the internal power source, for isolating the external power source and the internal power source; and a comparator, coupled to the external power source, for determining if the external power source is removed, and accordingly generating the removing signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of handling fast power removing detection for an electronic device, comprising:
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detecting if an external power source is removed, and accordingly generating a removing signal; and preparing to turn off and turning off an internal circuit of the electronic device according to the removing signal. - View Dependent Claims (20, 21, 22)
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Specification