Electronic device
First Claim
1. An electronic device connectable to an external power supply device and operated with a voltage from the external power supply device, the electronic device comprising:
- a transformer supplied with the voltage from the external power supply device;
an electric double-layer capacitor charged with an output voltage of the transformer;
a voltage converter connected to an output of the transformer;
a processor comprising a power supply terminal supplied with an output voltage of the voltage converter;
first and second photo-couplers supplied with the voltage from the external power supply device; and
a capacitor connected to a primary side of the second photo-coupler through a resistor, whereinthe primary side of the second photo-coupler is grounded via a pull-down resistor in the external power supply device, andthe processor comprises first and second terminals supplied with outputs of the first and second photo-couplers and a third terminal supplied with a charging voltage of the electric double-layer capacitor, and configured to detect occurrence of power failure or detachment of the electronic device from the external power supply device in response to a combination of states of the first, second and third terminals.
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Accused Products
Abstract
According to one embodiment, an electronic device includes a transformer connected to a power supply device, a super capacitor chargeable with an output of the transformer, a voltage converter connected to the transformer, a processor having a power supply terminal supplied with an output of the voltage converter, first and second photo-couplers connected to the power supply device, and a capacitor connected to a primary side of the second photo-coupler through a resistor. The primary side of the second photo-coupler is grounded via a pull-down resistor. The processor includes first and second terminals connected to the first and second photo-couplers and a third terminal supplied with a charging voltage of the super capacitor.
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Citations
18 Claims
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1. An electronic device connectable to an external power supply device and operated with a voltage from the external power supply device, the electronic device comprising:
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a transformer supplied with the voltage from the external power supply device; an electric double-layer capacitor charged with an output voltage of the transformer; a voltage converter connected to an output of the transformer; a processor comprising a power supply terminal supplied with an output voltage of the voltage converter; first and second photo-couplers supplied with the voltage from the external power supply device; and a capacitor connected to a primary side of the second photo-coupler through a resistor, wherein the primary side of the second photo-coupler is grounded via a pull-down resistor in the external power supply device, and the processor comprises first and second terminals supplied with outputs of the first and second photo-couplers and a third terminal supplied with a charging voltage of the electric double-layer capacitor, and configured to detect occurrence of power failure or detachment of the electronic device from the external power supply device in response to a combination of states of the first, second and third terminals. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for an electronic device connectable to a power supply device and operated with a voltage from the power supply device,
the electronic device comprising: -
a transformer supplied with the voltage from the power supply device; an electric double-layer capacitor charged with an output voltage of the transformer; a voltage converter connected to an output of the transformer; a processor comprising a power supply terminal supplied with an output voltage of the voltage converter; first and second photo-couplers supplied with the voltage from the power supply device; and a capacitor connected to a primary side of the second photo-coupler through a resistor, wherein the primary side of the second photo-coupler is grounded via a pull-down resistor in the power supply device, and the processor comprises first and second terminals supplied with outputs of the first and second photo-couplers and a third terminal supplied with a charging voltage of the electric double-layer capacitor, the method comprising; detecting occurrence of a power failure or detachment of the electronic device from the power supply device in response to a combination of states of the first, second and third terminals. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An electronic device, comprising:
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a power supply device; and a communication device attached to the power supply device, wherein the power supply device comprises; a first transceiver configured to communicate with the communication device; a converter configured to output a DC voltage from a commercial power supply; and a detection terminal connected to a ground of the commercial power supply via a pull-down resistor, and the communication device comprises; a second transceiver configured to communicate with the first transceiver; a transformer supplied with an output of the converter; an electric double-layer capacitor charged with an output voltage of the transformer; a voltage converter configured to convert the output voltage of the transformer and to supply the voltage to the second transceiver; first and second photo-couplers supplied with the output of the converter; and a capacitor connected to a primary side of the second photo-coupler through a resistor, wherein the second transceiver comprises first and second terminals supplied with outputs of the first and second photo-couplers, and a third terminal supplied with a charging voltage of the electric double-layer capacitor, and occurrence of a power failure or detachment of the electronic device from the power supply device is detected in response to a combination of states of the first, second and third terminals. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification