Voltage regulator, electronic system including the same, and operation method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsSunghun Cho, Juri Lee
Life of this patent
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Abstract
A voltage regulator configured to generate an output voltage includes a comparison unit configured to generate a second voltage based on a reference voltage and a first voltage generated by a feedback of the output voltage, a power noise replica buffer unit configured to generate a third voltage including a power noise copied based on the second voltage, and a pass transistor configured to generate the output voltage in response to the third voltage.
Claims20
A voltage regulator configured to generate an output voltage, comprising:
- a comparison unit configured to generate a second voltage, based on a reference voltage and a first voltage generated by a feedback of the output voltage;
- a power noise replica buffer unit configured to generate a third voltage including a power noise copied based on the second voltage;
- and
- a pass transistor configured to generate the output voltage in response to the third voltage,
- wherein the power noise replica buffer unit includes:
- a 0-th transistor connected between a ground node and a 0-th node, and configured to operate in response to the second voltage;
- a first transistor connected between the 0-th node and a power node and including a gate node connected to a second node;
- a high-pass filter connected between the second node and a third node;
- a second transistor connected between the power node and a first node connected to the third node and including a gate node connected to the third node;
- and
- a current source connected between the first node and the ground node,
- wherein the power noise replica buffer unit provides the third voltage through the 0-th node.
A voltage regulator configured to generate an output voltage, comprising:
- a comparison unit configured to generate a second voltage, based on a reference voltage and a first voltage generated by a feedback of the output voltage;
- a power noise replica buffer unit configured to generate a bias signal including a noise of a power supply voltage;
- a first buffer configured to generate a third voltage, based on the bias signal and the second voltage;
- a second buffer configured to buffer a fourth voltage, based on the third voltage;
- and
- a pass transistor configured to generate the output voltage in response to the fourth voltage.
An operation method of a voltage regulator, the method comprising:
- generating a first voltage by comparing a reference voltage and a feedback voltage of an output voltage;
- receiving, by a buffer circuit, a bias signal including a high-frequency component of a power supply voltage of the voltage regulator,
- generating, by the buffer circuit, a second voltage, based on the first voltage and the received bias signal;
- generating, by a post buffer circuit, a gate voltage based on the second voltage;
- and
- generating the output voltage, based on the gate voltage.
Dependencies are inferred from the claim text.