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US 2013/0293304 A1Published application
Compensation technique for feedback amplifiers
AssigneeAnalog Devices, Inc.
InventorQuan Wan
Life of this patent
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Abstract
Compensation methods and systems for voltage-feedback amplifiers provide improved dynamic performance (i.e., increased bandwidth and the elimination or alleviation of a slew limitation) at various gains by self-adaptively changing the Miller effect with respect to the gain setting.
Claims24
A system for extending a bandwidth and improving slew behavior of a feedback amplifier, the system comprising:
- an amplifier having an input node, an output node, and an intermediate node;
- a first feedback path between the input node and output node;
- and
- a second feedback path between the intermediate node and output node, the first feedback path sharing at least a portion of the second feedback path.
1 more element
A method for extending a bandwidth of a feedback amplifier, the method comprising:
- providing a first signal derived from an output voltage of an amplifier to an input node of the amplifier;
- and
- providing a second signal derived from the output voltage of an amplifier to an intermediate node of the amplifier,
- wherein the second signal increases a bandwidth of the feedback amplifier as a gain of the amplifier increases.
1 more element
A system for extending a bandwidth and improving slew behavior of a feedback amplifier, the system comprising:
- an amplifier having an input node, an output node, and an intermediate node;
- a first feedback path for providing, to the input node, a signal derived from an output voltage on the output node;
- and
- a second feedback path for providing, to the intermediate node, a signal derived from an output voltage on the output node.
1 more element
Dependencies are inferred from the claim text.