Rectifier circuit and operating method thereof
AssigneeASMedia Technology Inc.
InventorChieh-Jui Ho
Life of this patent
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Abstract
A rectifier circuit includes a transistor string, a bias generator, and a first level shifter. The transistor string includes a first transistor and a second transistor coupled in series. The bias generator is coupled to a control terminal of the second transistor, generates a first bias voltage according to a reference voltage and an output voltage of the rectifier circuit, and provides the first bias voltage to the control terminal of the second transistor. The first level shifter is coupled between a control terminal of the first transistor and the control terminal of the second transistor, shifts a voltage level of the first bias voltage to generate a first offset voltage, and provides the first offset voltage to the control terminal of the first transistor.
Claims13
A rectifier circuit, comprising:
- a transistor string, comprising a first transistor and a second transistor coupled in series;
- a bias generator, coupled to a control terminal of the second transistor, wherein the bias generator generates a first bias voltage according to a reference voltage and an output voltage of the rectifier circuit, and provides the first bias voltage to the control terminal of the second transistor;
- and
- a first level shifter, coupled between a control terminal of the first transistor and the control terminal of the second transistor, wherein the first level shifter shifts a voltage level of the first bias voltage to generate a first offset voltage, and provides the first offset voltage to the control terminal of the first transistor.
An operating method of a rectifier circuit, comprising:
- providing a transistor string having a first transistor and a second transistor coupled in series;
- providing a bias generator to generate a first bias voltage according to a reference voltage and an output voltage of the rectifier circuit;
- providing the first bias voltage to a control terminal of the second transistor;
- providing a first level shifter to shift a voltage level of the first bias voltage to generate a first offset voltage;
- and
- providing the first offset voltage to a control terminal of the first transistor.
Dependencies are inferred from the claim text.