公开(公告)号：US20090261902A1

公开(公告)日：2009-10-22

申请号：US12104874

申请日：2008-04-17

申请人： Pallab Midya ,  Matthew R. Miller ,  Theresa Paulo ,  William J. Roeckner

发明人： Pallab Midya ,  Matthew R. Miller ,  Theresa Paulo ,  William J. Roeckner

IPC分类号： H03F3/217

CPC分类号： H03F3/217

摘要： A circuit (104, 106) includes a comparison circuit (202, 504, 506, 602) and a correction circuit (204, 508, 510, 604). The comparison circuit provides a comparison signal (212, 524, 526, 612) in response to an error value (210, 520, 522, 610) and a reference value (214). The error value is based on a pulse modulated input signal (114) and a pulse modulated output signal (118). The correction circuit asynchronously provides a corrected pulse modulated signal (116) by selectively delaying and advancing an edge of the pulse modulated input signal based on the comparison signal. The pulse modulated output signal is based on the corrected pulse modulated signal.

摘要翻译： 电路（104,106）包括比较电路（202,504,506,602）和校正电路（204,508,510,604）。 比较电路响应于错误值（210,520,522,610）和参考值（214）提供比较信号（212,524,526,612）。 误差值基于脉冲调制输入信号（114）和脉冲调制输出信号（118）。 校正电路通过基于比较信号选择性地延迟和前进脉冲调制输入信号的边沿来异步地提供校正的脉冲调制信号（116）。 脉冲调制输出信号基于经校正的脉冲调制信号。

公开(公告)号：US20090102549A1

公开(公告)日：2009-04-23

申请号：US11875998

申请日：2007-10-22

申请人： Pallab Midya ,  Theresa Paulo ,  William J. Roeckner

发明人： Pallab Midya ,  Theresa Paulo ,  William J. Roeckner

IPC分类号： H03F3/38

CPC分类号： H03F3/217

摘要： A switching amplifier includes a power stage, a low pass filter, a combining circuit, and a feedback correction circuit. The power stage has an input terminal and an output terminal. The low pass filter has an input terminal coupled to the output terminal of the power stage, and an output terminal for providing a filtered pulse width modulated signal. The combining circuit has a first input terminal coupled to the output terminal of the power stage, a second input terminal coupled to the output terminal of the low pass filter, and an output terminal. The feedback correction circuit has a first input terminal for receiving a reference pulse width modulated signal, a second input terminal coupled to the output terminal of the combining circuit, and an output terminal coupled to the input terminal of the power stage.

摘要翻译： 开关放大器包括功率级，低通滤波器，组合电路和反馈校正电路。 功率级具有输入端子和输出端子。 低通滤波器具有耦合到功率级的输出端的输入端和用于提供经滤波的脉宽调制信号的输出端。 组合电路具有耦合到功率级的输出端的第一输入端，耦合到低通滤波器的输出端的第二输入端和输出端。 反馈校正电路具有用于接收参考脉冲宽度调制信号的第一输入端子，耦合到组合电路的输出端子的第二输入端子和耦合到功率级输入端子的输出端子。

公开(公告)号：US07629840B2

公开(公告)日：2009-12-08

申请号：US11875998

申请日：2007-10-22

申请人： Pallab Midya ,  Theresa Paulo ,  William J. Roeckner

发明人： Pallab Midya ,  Theresa Paulo ,  William J. Roeckner

IPC分类号： H03F3/38

CPC分类号： H03F3/217

摘要： A switching amplifier includes a power stage, a low pass filter, a combining circuit, and a feedback correction circuit. The power stage has an input terminal and an output terminal. The low pass filter has an input terminal coupled to the output terminal of the power stage, and an output terminal for providing a filtered pulse width modulated signal. The combining circuit has a first input terminal coupled to the output terminal of the power stage, a second input terminal coupled to the output terminal of the low pass filter, and an output terminal. The feedback correction circuit has a first input terminal for receiving a reference pulse width modulated signal, a second input terminal coupled to the output terminal of the combining circuit, and an output terminal coupled to the input terminal of the power stage.

摘要翻译： 开关放大器包括功率级，低通滤波器，组合电路和反馈校正电路。 功率级具有输入端子和输出端子。 低通滤波器具有耦合到功率级的输出端的输入端和用于提供经滤波的脉宽调制信号的输出端。 组合电路具有耦合到功率级的输出端的第一输入端，耦合到低通滤波器的输出端的第二输入端和输出端。 反馈校正电路具有用于接收参考脉冲宽度调制信号的第一输入端子，耦合到组合电路的输出端子的第二输入端子和耦合到功率级输入端子的输出端子。