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US 11,545,951 B2Granted
Methods and systems for detecting and managing amplifier instability
AssigneeCirrus Logic, Inc.
InventorDana J. Taipale
Life of this patent
Estimating the term…
Abstract
A system may include a first input for receiving a first signal for driving an amplifier that drives a load, a second input for receiving a second signal driven by the amplifier, and an instability detector for detecting instability of a feedback loop for controlling the first signal based on comparison of the first signal and the second signal.
Claims17
A method comprising:
- receiving a first signal for driving an amplifier that drives a load;
- receiving a second signal driven by the amplifier;
- performing a first transform of the first signal into real and imaginary components;
- performing a second transform of the second signal into real and imaginary components;
- detecting instability of a feedback loop for controlling the first signal based on comparison of the first signal and the second signal, wherein the comparison of the first signal and the second signal comprises comparing a phase difference between respective phase angles of the first signal and the second signal.
2 more elements
A system comprising:
- a first input for receiving a first signal for driving an amplifier that drives a load;
- a second input for receiving a second signal driven by the amplifier;
- and
- an instability detector configured to:
- perform a first transform of the first signal into real and imaginary components;
- perform a second transform of the second signal into real and imaginary components;
- and
- detect instability of a feedback loop for controlling the first signal based on comparison of the first signal and the second signal.
5 more elements
A host device comprising:
- an amplifier that drives a load;
- and
- a processing subsystem comprising:
- a first input for receiving a first signal for driving the amplifier;
- a second input for receiving a second signal driven by the amplifier;
- and
- an instability detector configured to:
- perform a first transform of the first signal into real and imaginary components;
- perform a second transform of the second signal into real and imaginary components;
- and
- detect instability of a feedback loop for controlling the first signal based on comparison of the first signal and the second signal.
8 more elements
Dependencies are inferred from the claim text.