Differential amplifier
AssigneeSilego Technology, Inc.
InventorsAmbreesh Bhattad, Gary Hague
Life of this patent
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Abstract
The present document relates to differential amplifiers. A differential amplifier may comprise a current source, a first transistor, a second transistor, and a compensation circuit. A reference voltage may be applied to a first terminal of the first transistor, and a second terminal of the first transistor may be coupled to an output of the current source. A feedback voltage may be applied to a first terminal of the second transistor, and a second terminal of the second transistor may be coupled to the output of the current source. The compensation circuit may comprise a capacitive element coupled to the first terminal of the first transistor, and the compensation circuit may be configured to reduce a change of the reference voltage at the first terminal of the first transistor.
Claims18
A differential amplifier comprising
- a current source,
- a first transistor, wherein a reference voltage is applied to a first terminal of the first transistor, and wherein a second terminal of the first transistor is coupled to an output of the current source,
- a second transistor, wherein a feedback voltage is applied to a first terminal of the second transistor, and wherein a second terminal of the second transistor is coupled to the output of the current source, and
- a compensation circuit with a capacitive element coupled to the first terminal of the first transistor, wherein the compensation circuit is configured to reduce a change of the reference voltage at the first terminal of the first transistor.
A method of operating a differential amplifier comprising a current source, a first transistor, a second transistor, and a compensation circuit with a capacitive element, the method comprising
- applying a reference voltage to a first terminal of the first transistor,
- coupling a second terminal of the first transistor to an output of the current source,
- applying a feedback voltage to a first terminal of the second transistor,
- coupling a second terminal of the second transistor to the output of the current source,
- coupling the capacitive element to the first terminal of the first transistor, and
- reducing, by the compensation circuit, a change of the reference voltage at the first terminal of the first transistor.
Dependencies are inferred from the claim text.