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US 9,854,357 B1Granted
Minimizing startup transients in an audio playback path
AssigneeCirrus Logic, Inc.
InventorsTejasvi Das, Anand Ilango
Life of this patent
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AssigneeCirrus Logic, Inc.
InventorsTejasvi Das, Anand Ilango
Estimating the term…
A method may be provided for powering up or down a playback path comprising a digital-to-analog converter (DAC) for generating a non-ground-centered analog intermediate voltage centered at a common-mode voltage and coupled to a driver for generating a ground-centered playback path output voltage at an output of the driver wherein the output of the driver is clamped via a finite impedance to a ground voltage. The method may include transitioning continuously or in a plurality of discrete steps the analog intermediate voltage from an initial voltage to the common-mode voltage such that the transitioning is substantially inaudible at the output of the driver. A method for operating an output clamp of an output driver stage of a playback path may include transitioning continuously or in a plurality of discrete steps an impedance of the output clamp in order to match an output offset of the output driver stage in order to minimize audio artifacts appearing at an output of the output driver stage.
A method for powering up or down a playback path comprising a digital-to-analog converter (DAC) for generating a non-ground-centered analog intermediate voltage centered at a common-mode voltage and coupled to a driver for generating a ground-centered playback path output voltage at an output of the driver, the method comprising:
A method for operating an output clamp of an output driver stage of a playback path comprising:
A playback path comprising:
A playback path comprising:
Dependencies are inferred from the claim text.