Power supply apparatus, test apparatus, and electronic device
First Claim
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1. A power supply apparatus comprising:
- a power supply section that receives a supply current and supplies an output current to an external load and a ground current to a ground; and
a current control section that outputs the supply current to the power supply section and flows a compensation current varying in a phase opposite to the supply current being supplied to the power supply section into the ground of the power supply section, whereina current obtained by adding the ground current, a feedback current from the external load, and the compensation current has an approximately steady value.
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Abstract
There is provided a power supply apparatus including a power supply section that supplies an output current to an external load, and a current control section that flows an electric current varying in a direction opposite to a supply current being supplied to the power supply section into a ground of the power supply section.
28 Citations
10 Claims
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1. A power supply apparatus comprising:
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a power supply section that receives a supply current and supplies an output current to an external load and a ground current to a ground; and a current control section that outputs the supply current to the power supply section and flows a compensation current varying in a phase opposite to the supply current being supplied to the power supply section into the ground of the power supply section, wherein a current obtained by adding the ground current, a feedback current from the external load, and the compensation current has an approximately steady value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A test apparatus that tests a device under test, the test apparatus comprising:
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a test section that tests the device under test; a power supply apparatus that supplies an output current to the device under test; and a main power supply that outputs a main power supply current for operating the power supply apparatus, and the power supply apparatus comprising; a power supply section that receives a supply current and supplies the output current to the device under test and a ground current to a ground; and a current control section that outputs the supply current to the power supply section and flows a compensation current varying in a phase opposite to the supply current being supplied to the power supply section into the ground of the power supply section, wherein a current obtained by adding the ground current, a feedback current from the device under test, and the compensation current has an approximately steady value. - View Dependent Claims (9)
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10. An electronic device comprising:
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an electronic circuit; a power supply section that receives a supply current and supplies an output current to the electronic circuit and a ground current to a ground; and a current control section that outputs the supply current to the power supply section and flows a compensation current varying in a phase opposite to the supply current being supplied to the power supply section into the ground of the power supply section, wherein a current obtained by adding the ground current, a feedback current from the electronic circuit, and the compensation current has an approximately steady value.
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Specification