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AssigneeSony Corporation
InventorsEiji MAKINO, Youji SAKIOKA, ShizunorI MATSUMOTO
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A power supply device that switches one of a first power supply, a second power supply, and a third power supply, all of which supply power to an auxiliary device, to a transfer gate in a CMOS image sensor having a photodiode and outputs the corresponding power to the transfer gate is disclosed. The device includes: a first transistor driven by the second power supply and outputting power of the second power supply to the transfer gate; a second transistor driven by the second power supply and outputting power of the first power supply to the transfer gate; a third transistor driven by the third power supply and outputting power of the third power supply to the transfer gate; and a fourth transistor located before the second transistor, driven by the first power supply, and outputting power of the first power supply to a source of the second transistor.
A power supply device that switches one of a first power supply, a second power supply having a higher potential than the first power supply, and a third power supply having a lower voltage than the first power supply, all of which supply power to an auxiliary device, to a transfer gate in a CMOS image sensor having a photodiode and outputs the corresponding power to the transfer gate, the device comprising:
An operation method of a power supply device that switches one of a first power supply, a second power supply having a higher potential than the first power supply, and a third power supply having a lower voltage than the first voltage, all of which supply power to an auxiliary device, to a transfer gate in a CMOS image sensor having a photodiode and outputs the corresponding power to the transfer gate and that includes a first transistor that is driven by the second power supply and outputs power of the second power supply to the transfer gate, a second transistor that is driven by the second power supply and outputs power of the first power supply to the transfer gate, a third transistor that is driven by the third power supply and outputs power of the third power supply to the transfer gate, and a fourth transistor that is located before the second transistor, is driven by the first power supply, and outputs power of the first power supply to a source of the second transistor, the method comprising the step of:
-6. (canceled)
Dependencies are inferred from the claim text.