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AssigneeKapik Inc.
InventorsRobert Neil McKENZIE, William Martin SNELGROVE, Wai Tung NG
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An audio amplifier system includes a delta-sigma modulator configured to receive an m-bit digital audio input signal and to generate a pulse density modulated signal based on the m-bit digital audio input signal. An analog power stage is coupled to the delta-sigma modulator to receive the pulse density modulated signal and amplify the pulse density modulated signal to generate an amplified pulse density modulated signal. A feedback circuit is coupled to the delta-sigma modulator and the analog power stage. The feedback circuit is configured to receive the amplified pulse density modulated signal and the pulse density modulated signal and to determine a digital error signal representative of a difference between the amplified pulse density modulated signal and the pulse density modulated signal. The feedback circuit is further configured to provide the digital error signal to the delta-sigma modulator for applying the digital error signal to a representation of the m-bit digital audio input signal.
An audio amplifier system comprising:
An audio amplifier system comprising a delta-sigma modulator configured to receive an m-bit digital audio input signal and generate a pulse density modulated signal based on the m-bit digital audio input signal, an analog power stage coupled to the delta-sigma modulator to receive the pulse density modulated signal and amplify the pulse density modulated signal to generate an amplified pulse density modulated signal, and a feedback circuit coupled to the delta-sigma modulator and the analog power stage, the feedback circuit configured to receive the amplified pulse density modulated signal and the pulse density modulated signal and to determine a digital error signal representative of a difference between the amplified pulse density modulated signal and the pulse density modulated signal, the feedback circuit further configured to provide the digital error signal to the delta-sigma modulator for applying the digital error signal to a representation of the m-bit digital audio input signal, wherein the feedback circuit is further configured to perform a transfer function on the amplified pulse density modulated signal.
An audio amplifier system comprising a delta-sigma modulator configured to receive an m-bit digital audio input signal and generate a pulse density modulated signal based on the m-bit digital audio input signal, an analog power stage coupled to the delta-sigma modulator to receive the pulse density modulated signal and amplify the pulse density modulated signal to generate an amplified pulse density modulated signal, and a feedback circuit coupled to the delta-sigma modulator and the analog power stage, the feedback circuit configured to receive the amplified pulse density modulated signal and the pulse density modulated signal and to determine a digital error signal representative of a difference between the amplified pulse density modulated signal and the pulse density modulated signal, the feedback circuit further configured to provide the digital error signal to the delta-sigma modulator for applying the digital error signal to a representation of the m-bit digital audio input signal, wherein the feedback circuit is further configured to perform a transfer function on the pulse density modulated signal.
A process for amplifying an m-bit digital audio input signal, the process comprising:
Dependencies are inferred from the claim text.