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AssigneeCirrus Logic, Inc.
InventorsAmar Vellanki, Xin Zhao, Jing Bai, John L. Melanson, Ku He, Wai-Shun Shum, Xiaofan Fei, Alan M. Morton
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An amplification system with an output driver stage for providing an output signal to acoustic output transducers such as speakers or haptic output devices removes signal distortion caused by output stage non-linearities by pre-distorting an input signal. The system includes the output driver stage, an input stage for receiving the input signal, and a processing block that receives the input signal and provides an output signal to the output driver stage. The processing block includes a pre-distortion circuit that applies a pre-distortion function to the input signal to generate the output signal if a signal level of the input signal is greater than a threshold amplitude, and if the signal level is less than or equal to the threshold amplitude, generates the output signal from the input signal by bypassing the pre-distortion circuit.
A method of reducing distortion in an amplifier for providing a drive signal to an acoustic output transducer, the amplifier comprising:
An amplification system for providing an output drive signal to an acoustic output transducer, comprising:
Dependencies are inferred from the claim text.