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US 12,671,345 B2Granted
Rectifying circuit and electric power source circuit
AssigneeAsahi Kasei Microdevices Corporation
InventorShiro Taga
Life of this patent
Estimating the term…
Abstract
Provided is a rectifying circuit comprising: a first connection portion which couples drain terminals of a first transistor and a second transistor; a first bias unit which biases an alternating current voltage component of alternating current electric power according to magnitude of amplitude of the alternating current voltage component and inputs the alternating current voltage component, which has been biased, to a gate terminal of the first transistor; and a second bias unit which biases the alternating current voltage component of the alternating current electric power inputted to according to the magnitude of the amplitude of the alternating current voltage component and inputs the alternating current voltage component, which has been biased, to a gate terminal of the second transistor.
Claims19
A rectifying circuit comprising:
- a first input terminal and a second input terminal to which alternating current electric power having mutually opposite phases is inputted;
- and a high voltage side output terminal and a low voltage side output terminal which output direct current electric power obtained by rectifying the alternating current electric power, the rectifying circuit comprising:
- a first transistor provided between the high voltage side output terminal and the low voltage side output terminal;
- a second transistor provided between the first transistor and the low voltage side output terminal and having a different channel type from that of the first transistor;
- a first connection portion which couples drain terminals of the first transistor and the second transistor and to which a voltage corresponding to the alternating current electric power inputted to the first input terminal is applied;
- a first bias unit which biases an alternating current voltage component of the alternating current electric power inputted to the second input terminal according to a magnitude of an amplitude of the alternating current voltage component and inputs the alternating current voltage component, which has been biased, to a gate terminal of the first transistor;
- and
- a second bias unit which biases the alternating current voltage component of the alternating current electric power inputted to the second input terminal according to the magnitude of the amplitude of the alternating current voltage component and inputs the alternating current voltage component, which has been biased, to a gate terminal of the second transistor, wherein
- when the magnitude of the amplitude of the alternating current voltage component is smaller than or equal to a first threshold voltage, the first bias unit biases the alternating current voltage component with a first bias voltage, and
- when the magnitude of the amplitude of the alternating current voltage component is greater than the first threshold voltage, the first bias unit biases the alternating current voltage component with a voltage closer to a voltage of the high voltage side output terminal than the first bias voltage.
7 more elements
An electric power source circuit comprising:
- an electric power source which generates alternating current electric power;
- and a rectifying circuit which rectifies the alternating current electric power for an output, wherein
- the rectifying circuit has:
- a first input terminal and a second input terminal to which the alternating current electric power having mutually opposite phases is inputted;
- a high voltage side output terminal and a low voltage side output terminal which output direct current electric power obtained by rectifying the alternating current electric power;
- a first transistor provided between the high voltage side output terminal and the low voltage side output terminal;
- a second transistor provided between the first transistor and the low voltage side output terminal and having a different channel type from that of the first transistor;
- a first connection portion which couples drain terminals of the first transistor and the second transistor and to which a voltage corresponding to the alternating current electric power inputted to the first input terminal is applied;
- a first bias unit which biases an alternating current voltage component of the alternating current electric power inputted to the second input terminal according to a magnitude of an amplitude of the alternating current voltage component and inputs the alternating current voltage component, which has been biased, to a gate terminal of the first transistor;
- and
- a second bias unit which biases the alternating current voltage component of the alternating current electric power inputted to the second input terminal according to the magnitude of the amplitude of the alternating current voltage component and inputs the alternating current voltage component, which has been biased, to a gate terminal of the second transistor, wherein
- when the magnitude of the amplitude of the alternating current voltage component is smaller than or equal to a first threshold voltage, the first bias unit biases the alternating current voltage component with a first bias voltage, and
- when the magnitude of the amplitude of the alternating current voltage component is greater than the first threshold voltage, the first bias unit biases the alternating current voltage component with a voltage closer to a voltage of the high voltage side output terminal than the first bias voltage.
10 more elements
Dependencies are inferred from the claim text.