POWER SUPPLY DC VOLTAGE OFFSET DETECTOR
First Claim
1. An apparatus comprising a power supply output voltage direct current (DC) offset detector, wherein an output voltage of a power supply comprises a ripple component and a DC offset, wherein the power supply output voltage DC offset detector comprises:
- a comparator to generate a comparison signal during a period of the ripple component, wherein the comparison signal represents a comparison between the ripple component and a reference voltage; and
a processor, coupled to the comparator, configured to;
determine, based on the comparison signal, at least one of;
(i) a first duration for which the ripple component is above the reference voltage and (ii) a second duration for which the ripple component is below the reference voltage; and
use the first and second ripple component durations to determine the DC offset of the output voltage during the period of the ripple component.
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Accused Products
Abstract
A power supply output voltage direct current (DC) offset detector determines a DC offset in a power supply output voltage signal, and the output voltage signal has a DC component and an alternating current (AC) “ripple” component. Once during each period of the ripple, the DC offset detector determines the DC offset from an output voltage signal using a comparison between the output voltage signal and a reference voltage. In at least one embodiment, from the comparison and during a period of the ripple, the DC offset detector determines an ‘above’ duration for which the ripple is above the reference voltage, determines a ‘below’ duration for which the ripple is below the reference voltage, or both to determine the DC offset of the power supply output voltage signal. The DC offset detector uses the above and/or below duration(s) to determine the DC offset of the output voltage signal.
102 Citations
20 Claims
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1. An apparatus comprising a power supply output voltage direct current (DC) offset detector, wherein an output voltage of a power supply comprises a ripple component and a DC offset, wherein the power supply output voltage DC offset detector comprises:
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a comparator to generate a comparison signal during a period of the ripple component, wherein the comparison signal represents a comparison between the ripple component and a reference voltage; and a processor, coupled to the comparator, configured to; determine, based on the comparison signal, at least one of;
(i) a first duration for which the ripple component is above the reference voltage and (ii) a second duration for which the ripple component is below the reference voltage; anduse the first and second ripple component durations to determine the DC offset of the output voltage during the period of the ripple component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method to determine a direct current (DC) offset of an output voltage of a power supply, wherein the output voltage comprises a periodic ripple component and a DC offset, the method comprising:
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generating a comparison signal during a period of the ripple component, wherein the comparison signal represents a comparison between the ripple component and a reference voltage; determining, based on the comparison signal, at least one of;
(i) a first duration for which the ripple component is above the reference voltage and (ii) a second duration for which the ripple component is below the reference voltage; andusing the first and second ripple component durations to determine the DC offset of the output voltage during the period of the ripple component. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A sampling module to sample a power supply output voltage, wherein the power supply output voltage comprises a ripple component and a DC offset, wherein the sampling module comprises:
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a comparator to generate a comparison signal during a period of the ripple component, wherein the comparison signal represents a comparison between the ripple component and a reference voltage; and a processor, coupled to the comparator, configured to; determine, based on the comparison signal, a duration for which the ripple component is above the reference voltage; and use the duration for which the ripple component is above the reference voltage and use the period of the ripple component to determine a sample of the output voltage during the period of the ripple component.
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20. A sampling module to sample a power supply output voltage, wherein the power supply output voltage comprises a ripple component and a DC offset, wherein the sampling module comprises:
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a comparator to generate a comparison signal during a period of the ripple component, wherein the comparison signal represents a comparison between the ripple component and a reference voltage; and a processor, coupled to the comparator, configured to; determine, based on the comparison signal, a duration for which the ripple component is below the reference voltage; and use the duration for which the ripple component is below the reference voltage and use the period of the ripple component to determine a sample of the output voltage during the period of the ripple component.
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Specification