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US 2013/0293293 A1Published application
Compensation technique for feedback amplifiers
AssigneeAnalog Devices, Inc.
InventorQuan Wan
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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 high gains by direct feedback of an AC signal (i.e., an intermediate voltage) to an amplifier input without being attenuated by feedback resistor network.
Claims15
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 input node, a signal derived from an intermediate voltage on the intermediate node.
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 an intermediate voltage of the amplifier to an input 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
Dependencies are inferred from the claim text.