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US 12,283,929 B2Granted
Audio amplifier circuitry
AssigneeCirrus Logic, Inc.
InventorsDavid P. Singleton, Andrew J. Howlett, John B. Bowlerwell
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Abstract
The present disclosure relates to circuitry comprising audio amplifier circuitry for receiving an audio signal to be amplified; and first and second output nodes for outputting first and second differential output signals. The circuitry further comprises common mode buffer circuitry configured to receive a common mode voltage and to selectively output the common mode voltage to the first and second output nodes.
Claims18
Circuitry comprising:
- audio amplifier circuitry for receiving an audio signal to be amplified;
- first and second output nodes for outputting first and second differential output signals;
- and
- an output clamp switch coupled between the first and second output nodes, to selectively couple the first and second output nodes to each other;
- wherein the circuitry further comprises common mode buffer circuitry configured to selectively output a common mode signal to the first and second output nodes;
- and
- low pass filter circuitry having an input that is configured to receive a common mode voltage and an output coupled to an input of the common mode buffer circuitry.
4 more elements
Amplifier circuitry for receiving a signal to be amplified, the amplifier circuitry comprising:
- first and second output nodes for outputting first and second differential output signals;
- an output clamp switch coupled to the first and second output nodes, to selectively couple the first and second output nodes to each other;
- a dummy output stage;
- a dummy feedback path for selectively coupling an output of the dummy output stage to an input of the amplifier circuitry;
- a real output stage;
- and
- a real feedback path for selectively coupling an output of the real output stage to the input of the amplifier circuitry.
4 more elements
Circuitry comprising:
- first signal processing circuitry comprising first and second output signal paths for outputting a differential output signal;
- an output clamp switch coupled between the first and second output nodes, to selectively couple the first and second output signal paths to each other;
- second circuitry configured to output a common mode voltage to said first and second output signal paths;
- and
- low pass filter circuitry having an input that is configured to receive a common mode voltage and an output coupled to an input of the second circuitry.
2 more elements
Dependencies are inferred from the claim text.