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US 12,040,751 B2Granted
Amplifier and electronic device including amplifier
AssigneeSamsung Electronics Co., Ltd.
InventorHyunseok Nam
Life of this patent
Estimating the term…
Abstract
An amplifier includes an input circuit that amplifies a difference between a first input voltage and a second input voltage to generate a first current and a second current. A positive feedback circuit amplifies a difference between the first current and the second current to generate a third current and a fourth current and outputs a difference between the third current and the fourth current through an output node. A temperature compensation circuit adjusts an amplification factor of the positive feedback circuit in response to a change of temperature.
Claims19
An amplifier comprising:
- an input circuit configured to amplify a difference between a first input voltage and a second input voltage to generate a first current and a second current;
- a positive feedback circuit configured to amplify a difference between the first current and the second current to generate a third current and a fourth current and to output a difference between the third current and the fourth current through an output node;
- and
- a temperature compensation circuit configured to adjust an amplification factor of the positive feedback circuit in response to a change of temperature between the positive feedback circuit and a ground node.
1 more element
An amplifier comprising:
- an input circuit configured to amplify a difference between a first input voltage and a second input voltage to generate a first current and a second current;
- a positive feedback circuit configured to amplify a difference between the first current and the second current to generate a third current and a fourth current and to output a difference between the third current and the fourth current through an output node;
- and
- a temperature compensation circuit configured to adjust an amplification factor of the positive feedback circuit in response to a change of temperature between the positive feedback circuit and a power node.
1 more element
An electronic device comprising:
- an amplifier;
- a temperature compensation circuit configured to compensate for a change of an amplification factor of the amplifier due to a change of temperature;
- and
- a voltage compensation circuit configured to compensate for a change of the amplification factor of the amplifier due to a change of a power supply voltage, wherein:
- the amplifier includes:
- a current source;
- a first transistor configured to pass a first current to the current source in response to a first input voltage;
- a second transistor configured to pass a second current to the current source in response to a second input voltage;
- a first current mirror configured to output a third current based on the first current;
- a second current mirror configured to output a fourth current based on the second current;
- a third transistor including a first terminal at which the third current is sunk, a second terminal connected with the temperature compensation circuit, and a gate connected with a second node at which the fourth current is sunk;
- a fourth transistor including a first terminal connected with the second node, a second terminal connected with the temperature compensation circuit, and a gate connected with a first node;
- a third current mirror connected with the first node and configured to sink a fifth current based on the third current and a current flowing through the third transistor;
- a fourth current mirror connected with the second node and configured to sink a sixth current based on the fourth current and a current flowing through the fourth transistor;
- and
- a fifth current mirror configured to generate a seventh current based on the fifth current, and
- the amplifier outputs a difference between the sixth current and the seventh current.
14 more elements
Dependencies are inferred from the claim text.