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公开(公告)号：US11683015B2
公开(公告)日：2023-06-20
申请号：US17404862
申请日：2021-08-17
发明人： ChienChung Yang , Dongyang Tang , Sherif Galal , Xinwang Zhang , Subbarao Surendra Chakkirala , Pradeep Silva
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.
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公开(公告)号：US12028030B2
公开(公告)日：2024-07-02
申请号：US17648958
申请日：2022-01-26
发明人： Dongyang Tang , Xinwang Zhang , ChienChung Yang , Earl Schreyer , Sherif Galal
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.
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