DYNAMIC RANGE BOOST FOR AMPLIFIERS
    1.
    发明公开

    公开(公告)号:US20240223206A1

    公开(公告)日:2024-07-04

    申请号:US18147183

    申请日:2022-12-28

    CPC classification number: H03M1/46 H03M1/18 H03M1/66

    Abstract: Examples of amplifiers and associated control blocks control analog and digital gains of such an amplifier to maintain a ripple voltage at the input/virtual terminals of an internal integrator below an upper limit. Such an example amplifier comprises digital and analog processing blocks. The digital processing block receives a digital audio signal and also includes a digital gain component. The analog processing block includes an analog gain component and an output stage having a supply voltage terminal. A boost controller receives the digital audio signal, and has a digital output and a boost voltage output to output a boost voltage. A digital controller receives the digital audio signal, and has a first digital input coupled to the digital output of the boost controller and a second digital input to receive a measurement value indicative of the outputted boost voltage. Based on its inputs, the digital controller controls the digital and analog gain components.

    RECONFIGURATION FOR A MULTI-CHANNEL AUDIO SYSTEM

    公开(公告)号:US20250110686A1

    公开(公告)日:2025-04-03

    申请号:US18476420

    申请日:2023-09-28

    Abstract: An apparatus includes an amplifier having an input. An interface has inputs and an output. The interface is configured to: invert each bit of a value received at a first input of the interface to produce an inverted value; and provide the inverted value at the output. A processor has an input coupled the output of the interface, has first output coupled to a second input of the interface, and has a second output coupled to the input of the amplifier. The processor is configured to determine whether to set an adjustable gain setting of an audio processing block to the inverted value.

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