Power supply device, power supply method, portable electronics apparatus, and electronic timepiece
First Claim
1. A power supplying device for rectifying an alternating current voltage to supply power to a first power source line and a second power source line, comprising a uni-direction unit comprising two terminals, a comparator for comparing terminal voltages at the two terminals, and a switch means that is controlled for an on-and-off operation in response to a comparison result provided by the comparator, the uni-direction unit allowing a current to flow from one terminal to the other terminal through the switch means, the power supplying device comprising:
- a storage device for storing power, arranged between the first power source line and the second power source line, wherein the uni-direction unit starts an operation for turning off the switch means with a duration in advance, corresponding to a response delay time.
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Accused Products
Abstract
In a rectifier circuit that rectifies an alternating current voltage generated by a generator and supplies the alternating current voltage to a capacitor as a power storage unit, a plurality of level shifters supplies a voltage level-shifted by an offset voltage to respective comparators when the comparators corresponding to transistors perform an on-and-off control, based on voltages across terminals of each of a plurality of transistors forming the rectifier circuit. The offset voltage is set accounting for a response delay time of each comparator. Each transistor is reliably turned off at the time the transistor should be turned off in relation to the voltage across the output terminals of the generator. As a result, a reverse current from the capacitor is thus prevented. A delay in the timing of turning off each transistor is eliminated.
59 Citations
32 Claims
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1. A power supplying device for rectifying an alternating current voltage to supply power to a first power source line and a second power source line, comprising a uni-direction unit comprising two terminals, a comparator for comparing terminal voltages at the two terminals, and a switch means that is controlled for an on-and-off operation in response to a comparison result provided by the comparator, the uni-direction unit allowing a current to flow from one terminal to the other terminal through the switch means, the power supplying device comprising:
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a storage device for storing power, arranged between the first power source line and the second power source line, wherein the uni-direction unit starts an operation for turning off the switch means with a duration in advance, corresponding to a response delay time. - View Dependent Claims (2, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 20, 25, 29, 30, 31, 32)
a first switch connected between a first input terminal and the first power source line, and a second switch connected between a second input terminal and the first power source line, wherein the uni-direction unit comprises;
a first direction controller, connected between the first input terminal and the second power source line, for allowing a current to flow in one direction only, and a second direction controller, connected between the second input terminal and the second power source line, for allowing a current to flow in one direction only, wherein the comparator comprises;
a first comparator for comparing a voltage at the first input terminal with a voltage at the first power source line, and a second comparator for comparing a voltage at the second input terminal with the voltage at the first power source line, and wherein the power supplying device further comprises;
a first controller which controls the first switch for an on-and-off operation in response to a comparison result provided by the first comparator, while forcing the first switch to turn off in response to the voltage at the second input terminal even when the comparison result provided by the first comparator indicates that the first switch is turned on, and a second controller which controls the second switch for an on-and-off operation in response to a comparison result provided by the second comparator, while forcing the second switch to turn off in response to the voltage at the second input terminal even when the comparison result provided by the second comparator indicates that the second switch is turned on.
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8. A power supplying device according to claim 1, comprising a diode connected in parallel with the switch means.
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9. A power supplying device according to claim 1, wherein the switch means is a field-effect transistor.
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10. A power supplying device according to claim 8, wherein the switch means is a field-effect transistor while the diode is a parasitic diode of the field-effect transistor.
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11. A power supplying device according to claim 1, wherein the uni-direction unit is integrated on a semiconductor substrate.
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12. A power supplying device according to claim 7, wherein the first controller further comprises:
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a first detector for detecting that a voltage difference between the second input terminal and the first power source line becomes larger than a predetermined reference value, and a first control unit which controls the first switch for an on-and-off operation in response to the comparison result provided by the first comparator means, while forcing the first switch to turn off in response to a detection result provided by the first detector even when the comparison result provided by the first comparator indicates that the first switch is turned on; and
the second controller further comprises;
a second detector for detecting that a voltage difference between the first input terminal and the first power source line becomes larger than the predetermined reference value, and a second control unit which controls the second switch for an on-and-off operation in response to the comparison result provided by the second comparator, while forcing the second switch to turn off in response to the detection result provided by the second detector even when the comparison result provided by the second comparator indicates that the second switch is turned on.
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13. A power supplying device according to claim 7, wherein the first direction controller is a third switch means that is controlled for an on-and-off operation in response to the voltage at the first input terminal, and the second direction controller is a fourth switch that is controlled for an on-and-off operation in response to the voltage at the second input terminal.
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14. A power supplying device according to claim 7, further comprising a first detector for detecting that a voltage difference between the second input terminal and the first power source line is larger than a predetermined reference value, and a second detector for detecting that a voltage difference between the first input terminal and the first power source line is larger than the predetermined reference value,
wherein the first comparator and the second comparator are supplied with power when the first detector or the second detector means detects the voltage difference larger than the predetermined reference value. -
15. A power supplying device according to claim 13, further comprising:
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a first diode connected in parallel with the first switch, a second diode connected in parallel with the second switch, a third diode connected in parallel with the third switch, and a fourth diode connected in parallel with the fourth switch.
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16. A power supplying device according to claim 13, wherein the first through fourth switches are respectively field-effect transistors.
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17. A power supplying device according to claim 15, wherein the first through fourth switches are respectively field-effect transistors, and the first and second diodes are respectively parasitic diodes of the first and second field-effect transistors.
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20. A power supplying device according to claim 13, wherein the first through fourth switches are integrated on a semiconductor substrate.
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25. A power supplying device according to claim 1, further comprising an alternating current voltage generator for supplying the alternating current voltage.
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29. Portable electronic equipment comprising a power supplying device according to claim 1, and a processor for performing a predetermined process, operated from power supplied by the power supplying device.
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30. Portable electronic equipment according to claim 29, wherein at least a portion of the processor means is integrated on a semiconductor substrate.
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31. An electronic timepiece comprising a power supplying device according to claim 1, and
a time measurer for performing a time measurement operation, operated from power supplied by the power supplying device. -
32. An electronic timepiece according to claim 31, wherein at least a portion of the time measurer is integrated on a semiconductor substrate.
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3. A power supplying device for rectifying an alternating current voltage to supply power to a first power source line and a second power source line, comprising a plurality of uni-direction units, each uni-direction unit comprising two terminals, a comparator for comparing terminal voltages at the two terminals, and a switch that is controlled for an on-and-off operation in response to a comparison result provided by the comparator, each uni-direction unit allowing a current to flow from one terminal to the other terminal through the respective switch, the power supplying device comprising:
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a storage device for storing power, arranged between the first power source line and the second power source line, wherein one terminal of a first uni-direction unit is connected to a first input terminal to which the alternating current voltage is supplied, the other terminal of the first uni-direction unit is connected to the first power source line, one terminal of a second uni-direction unit is connected to a second input terminal to which the alternating current voltage is supplied, the other terminal of the second uni-direction unit is connected to the first power source line, one terminal of a third uni-direction unit is connected to the second power source line, the other terminal of the third uni-direction unit is connected to the first input terminal, one terminal of a fourth uni-direction unit is connected to the second power source line, the other terminal of the fourth uni-direction unit is connected to the second input terminal, and at least two of the four uni-direction units start an operation for turning off the respective switch with a response delay time in advance. - View Dependent Claims (4, 18, 19)
a first comparator for comparing a voltage at the first input terminal with a voltage at the first power source line, a second comparator for comparing a voltage at the second input terminal with the voltage at the first power source line, a third comparator which compares the voltage at the first input terminal with a voltage at the second power source line and has a response delay time shorter than that of the second comparator, and a fourth comparator which compares the voltage at the second input terminal with the voltage at the second power source line, and has a response delay time shorter than that of the first comparator, wherein the respective switches comprise;
a first switch connected between the first input terminal and the first power source line, a second switch connected between the second input terminal and the first power source line, a third switch connected between the first input terminal and the second power source line, and controlled for an on-and-off operation in response to a comparison result provided by the third comparator, and a fourth switch connected between the second input terminal and the second power source line, and controlled for an on-and-off operation in response to a comparison result provided by the fourth comparator, and wherein the power supplying device further comprises;
a first controller which controls the first switch for an on-and-off operation in response to a comparison result provided by the first comparator, while forcing the first switch to turn off when the comparison result provided by the fourth comparator indicates the turning off of the fourth switch even when the comparison result provided by the first comparator indicates that the first switch is turned on, and a second controller which controls the second switch for an on-and-off operation in response to a comparison result provided by the second comparator, while forcing the second switch to turn off when the comparison result provided by the third comparator indicates the turning off of the third switch even when the comparison result provided by the second comparator indicates that the second switch is turned on.
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19. A power supplying device according to claim 18, further comprising:
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a first detector for comparing the voltage at the second input terminal with the voltage at the second power source line, and a second detector for comparing the voltage at the first input terminal with the voltage at the first power source line, wherein the first through fourth comparators are supplied with power when one of the first detector and the second detector detects power generation.
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5. A power supplying device comprising a plurality of uni-direction units, each uni-direction unit comprising two terminals, a comparator for comparing terminal voltages at the two terminals, and a switch that is controlled for an on-and-off operation in response to a comparison result provided by the comparator, the uni-direction unit allowing a current to flow from one terminal to the other terminal through the respective switch, the power supplying device comprising:
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a first storage device with one terminal thereof connected to a first input terminal to which an alternating current voltage is supplied, and a second storage device with one terminal thereof connected to a second input terminal to which the alternating current voltage is supplied, wherein one terminal of a first uni-direction unit is connected to the other terminal of the first storage device, and the other terminal of the first uni-direction unit is connected to the first input terminal to which the alternating current voltage is supplied, one terminal of a second uni-direction unit is connected to the other terminal of the second storage device, and the other terminal of the second uni-direction unit is connected to the other terminal of the first storage device, and the first and second uni-direction units start an operation for turning off the respective switch with a duration in advance, corresponding to response delay time. - View Dependent Claims (6, 21, 22, 23, 24)
a first diode connected in parallel with a first switch, and a second diode connected in parallel with a second switch.
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22. A power supplying device according to claim 5, wherein each switch is a field-effect transistor.
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23. A power supplying device according to claim 5, wherein the first and second switches are respectively field-effect transistors.
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24. A power supplying device according to claim 5, wherein each switch is integrated on a semiconductor substrate.
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26. A power supplying method for a power supplying device for rectifying an alternating current voltage to supply power to a first power source line and a second power source line, the power supplying device comprising a plurality of uni-direction units, each uni-direction unit comprising two terminals, a comparator for comparing terminal voltages at the two terminals, and a switching unit that is controlled for an on-and-off operation in response to a comparison result provided by the comparator, each uni-direction unit allowing a current to flow from one terminal to the other terminal through the switching unit, and a storage unit, for storing power, arranged between the first power source line and the second power source line, wherein an operation for turning off the switching unit is started in advance according to a response delay time.
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27. A power supplying method for a power supplying device for rectifying an alternating current voltage to supply power to a first power source line and a second power source line, comprising a plurality of uni-direction units, each uni-direction unit comprising two terminals, a comparator for comparing terminal voltages at the two terminals, and a switching unit that is controlled for an on-and-off operation in response to a comparison result provided by the comparator, the uni-direction units allowing a current to flow from one terminal to the other terminal through the switching unit, and a storage unit for storing power, arranged between the first power source line and the second power source line, wherein one terminal of a first uni-direction unit is connected to a first input terminal to which the alternating current voltage is supplied, the other terminal of the first uni-direction unit is connected to the first power source line, one terminal of a second uni-direction unit is connected to a second input terminal to which the alternating current voltage is supplied, the other terminal of the second uni-direction unit is connected to the first power source line, one terminal of a third uni-direction unit is connected to the second power source line, the other terminal of the third uni-direction unit is connected to the first input terminal, one terminal of a fourth uni-direction unit is connected to the second power source line, the other terminal of the fourth uni-direction unit is connected to the second input terminal, wherein an operation for turning off the switching units of at least two of the four uni-direction units is started with a duration in advance corresponding to a response delay time.
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28. A power supplying method for a power supplying device comprising a plurality of uni-direction units, each uni-direction unit comprising two terminals, a comparator for comparing terminal voltages at the two terminals, and a switching unit that is controlled for an on-and-off operation in response to a comparison result provided by the comparator, the uni-direction unit allowing a current to flow from one terminal to the other terminal through the switching unit, and a first storage unit with one terminal thereof connected to a first input terminal to which an alternating current voltage is supplied, and a second storage unit with one terminal thereof connected to a second input terminal to which the alternating current voltage is supplied, wherein one terminal of a first uni-direction unit is connected to the other terminal of the first storage unit, the other terminal of the first uni-direction unit is connected to the first input terminal to which the alternating current voltage is supplied, one terminal of a second uni-direction unit is connected to the other terminal of the second storage unit, and the other terminal of the second uni-direction unit is connected to the other terminal of the first storage unit, wherein an operation for turning off the respective switching units for the first and second uni-direction units is started with a duration in advance, corresponding to a response delay time.
Specification