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9 条记录 (耗时 0.014 秒)

    Class-D amplifier with deadtime distortion compensation
    1.
    发明授权
    Class-D amplifier with deadtime distortion compensation 有权

    公开(公告)号：US11683015B2

    公开(公告)日：2023-06-20

    申请号：US17404862

    申请日：2021-08-17

    申请人： QUALCOMM Incorporated

    发明人： ChienChung Yang ,  Dongyang Tang ,  Sherif Galal ,  Xinwang Zhang ,  Subbarao Surendra Chakkirala ,  Pradeep Silva

    IPC分类号： H03F1/32 ,  H03F3/217

    CPC分类号： H03F1/3205 ,  H03F3/2173 ,  H03F2200/03 ,  H03F2200/165 ,  H03F2200/351

    摘要： A class-D amplifier including a pulse width modulator including an input configured to receive a first signal based on an input signal, and an output configured to generate a pulse width modulated (PWM) signal; an H-bridge including an input coupled to an output of the pulse width modulator and an output coupled to a load, wherein the H-bridge is configured to generate an output signal across the load based on the PWM signal; and a deadtime compensation circuit coupled to the H-bridge, wherein the deadtime compensation circuit is configured to compensate for deadtime distortion in the output signal. The deadtime compensation circuit may be a feedback circuit between an output of the H-bridge and an input of the pulse width modulator, a pulse modification circuit at the output of the pulse width modulator, or an offset signal generating circuit providing an offset signal to the pulse width modulator.

    Voltage-to-current architecture and error correction schemes
    2.
    发明授权
    Voltage-to-current architecture and error correction schemes 有权

    公开(公告)号：US11536749B2

    公开(公告)日：2022-12-27

    申请号：US17154758

    申请日：2021-01-21

    申请人： QUALCOMM Incorporated

    发明人： Ramkumar Sivakumar ,  Jingxue Lu ,  Sherif Galal ,  Xinwang Zhang ,  Kshitij Yadav

    IPC分类号： H03F3/20 ,  H03F1/00 ,  H04R3/00 ,  G01R19/00 ,  H03F3/217 ,  H03F1/02

    摘要： Certain aspects of the present disclosure are generally directed to circuitry and techniques for voltage-to-current conversion. For example, certain aspects provide a circuit for signal amplification including a first amplifier; a first transistor, a gate of the first transistor being coupled to an output of the first amplifier and a drain of the first transistor being coupled to an output node of circuit; a first resistive element coupled between a first input node of the circuit and an input of the first amplifier; a second amplifier; a second transistor, a gate of the second transistor being coupled to an output of the second amplifier and a drain of the second transistor being coupled to the output node of circuit; and a second resistive element coupled between a second input node of the circuit and an input of the second amplifier.

    Dynamic common-mode adjustment for power amplifiers
    5.
    发明授权
    Dynamic common-mode adjustment for power amplifiers 有权

    公开(公告)号：US12028030B2

    公开(公告)日：2024-07-02

    申请号：US17648958

    申请日：2022-01-26

    申请人： QUALCOMM Incorporated

    发明人： Dongyang Tang ,  Xinwang Zhang ,  ChienChung Yang ,  Earl Schreyer ,  Sherif Galal

    IPC分类号： H03F3/217 ,  H03F3/45

    CPC分类号： H03F3/217 ,  H03F2200/03

    摘要： Aspects of the present disclosure relate to apparatus and methods for dynamically adjusting the common-mode input signal of a power amplifier, such as a class-D power amplifier. One example power amplifier circuit generally includes a first amplifier having a signal input and a power input; and a common-mode adjustment circuit having a first input coupled to the power input of the first amplifier, having an output coupled to the signal input of the first amplifier, and being configured to generate a common-mode signal to apply to the signal input of the first amplifier, based on a power supply voltage on the power input of the first amplifier.