公开(公告)号：US08362832B2

公开(公告)日：2013-01-29

申请号：US12850782

申请日：2010-08-05

申请人： Bong-Joo Kim ,  Wang-Seup Yeum ,  Yong-Hee Lee ,  Seung-Bin You ,  Chun Kyun Seok

发明人： Bong-Joo Kim ,  Wang-Seup Yeum ,  Yong-Hee Lee ,  Seung-Bin You ,  Chun Kyun Seok

IPC分类号： H03F3/38

CPC分类号： H03F3/2173 ,  H03G3/007

摘要： A half-bridge three-level pulse width modulation (PWM) amplifier includes a prescaling unit, a PWM generator configured to convert the input signal to a three-level PWM signal having a first level, a second level and a reference level and an output stage. The prescaling unit scales an input signal according to at least one gain value to provide a scaled signal. The PWM generator varies the width of pulses having the first level and varies the width of pulses having a second level based on the scaled signal. The output stage drives an output node to a level of a first power supply voltage, a second power supply voltage or a third power supply voltage based on the three-level PWM signal. The output node is connected to a load. The magnitude of the at least one gain value compensates for variations of power supply voltages.

摘要翻译： 半桥三电平脉宽调制（PWM）放大器包括一个预分频单元，一个PWM发生器，被配置为将输入信号转换成具有第一电平，第二电平和参考电平的三电平PWM信号，以及输出 阶段。 预分频单元根据至少一个增益值缩放输入信号以提供缩放信号。 PWM发生器改变具有第一电平的脉冲的宽度，并且基于缩放的信号改变具有第二电平的脉冲的宽度。 输出级基于三电平PWM信号将输出节点驱动到第一电源电压，第二电源电压或第三电源电压的电平。 输出节点连接到一个负载。 至少一个增益值的大小补偿电源电压的变化。

公开(公告)号：US20110080217A1

公开(公告)日：2011-04-07

申请号：US12845424

申请日：2010-07-28

申请人： Yong-Hee Lee ,  Chun Kyun Seok ,  Wang-Seup Yeum ,  Seung-Bin You ,  Bong-Joo Kim

发明人： Yong-Hee Lee ,  Chun Kyun Seok ,  Wang-Seup Yeum ,  Seung-Bin You ,  Bong-Joo Kim

IPC分类号： H03F3/04 ,  H03F1/00

CPC分类号： H03F3/181 ,  H03F1/30 ,  H03F3/217

摘要： An audio amplifier includes a compensation unit, an output unit and a calibration unit. The compensation unit generates a compensation signal based on a digital input signal, a digital reference code, a mode signal and a digital approximation code. The output unit generates an output signal based on the compensated input signal. The calibration unit generates the digital approximation code based on the output signal and the mode signal. The digital approximation code includes a plurality of bits that are generated sequentially.

摘要翻译： 音频放大器包括补偿单元，输出单元和校准单元。 补偿单元基于数字输入信号，数字参考码，模式信号和数字近似码产生补偿信号。 输出单元基于经补偿的输入信号产生输出信号。 校准单元基于输出信号和模式信号生成数字近似码。 数字近似码包括顺序生成的多个位。

公开(公告)号：US20080088370A1

公开(公告)日：2008-04-17

申请号：US11889417

申请日：2007-08-13

申请人： Seung-Bin You ,  Chun-Kyun Seok

发明人： Seung-Bin You ,  Chun-Kyun Seok

IPC分类号： H03F3/217

CPC分类号： H03F3/2171

摘要： A digital amplifier, a noise reduction circuit and a method of reducing noise from an output signal of a digital amplifier are described in this disclosure. The digital amplifier includes a driving circuit for providing a driving signal, a filter for filtering the driving signal and providing the filtered driving signal to a resistive load connected between an output node and a reference node of the digital amplifier, a noise reduction circuit controlling the reference node to be in a floating state to reduce noise while the filtered driving signal provided to the load via the output node stabilizes.

摘要翻译： 在本公开中描述了数字放大器，降噪电路和降低来自数字放大器的输出信号的噪声的方法。 数字放大器包括用于提供驱动信号的驱动电路，用于对驱动信号进行滤波的滤波器，并将经滤波的驱动信号提供给连接在数字放大器的输出节点和参考节点之间的电阻负载;噪声降低电路， 参考节点处于浮置状态以降低噪声，同时经由输出节点提供给负载的经滤波的驱动信号稳定。

公开(公告)号：US20110064245A1

公开(公告)日：2011-03-17

申请号：US12850782

申请日：2010-08-05

申请人： Bong-Joo Kim ,  Wang-Seup Yeum ,  Yong-Hee Lee ,  Seung-Bin You ,  Chun Kyun Seok

发明人： Bong-Joo Kim ,  Wang-Seup Yeum ,  Yong-Hee Lee ,  Seung-Bin You ,  Chun Kyun Seok

IPC分类号： H03G3/00 ,  H03F1/00

CPC分类号： H03F3/2173 ,  H03G3/007

摘要： A half-bridge three-level pulse width modulation (PWM) amplifier includes a prescaling unit, a PWM generator configured to convert the input signal to a three-level PWM signal having a first level, a second level and a reference level and an output stage. The prescaling unit scales an input signal according to at least one gain value to provide a scaled signal. The PWM generator varies the width of pulses having the first level and varies the width of pulses having a second level based on the scaled signal. The output stage drives an output node to a level of a first power supply voltage, a second power supply voltage or a third power supply voltage based on the three-level PWM signal. The output node is connected to a load. The magnitude of the at least one gain value compensates for variations of power supply voltages.

摘要翻译： 半桥三电平脉宽调制（PWM）放大器包括一个预分频单元，一个PWM发生器，被配置为将输入信号转换成具有第一电平，第二电平和参考电平的三电平PWM信号，以及输出 阶段。 预分频单元根据至少一个增益值缩放输入信号以提供缩放信号。 PWM发生器改变具有第一电平的脉冲的宽度，并且基于缩放的信号改变具有第二电平的脉冲的宽度。 输出级基于三电平PWM信号将输出节点驱动到第一电源电压，第二电源电压或第三电源电压的电平。 输出节点连接到一个负载。 至少一个增益值的大小补偿电源电压的变化。

公开(公告)号：US20080129377A1

公开(公告)日：2008-06-05

申请号：US11998216

申请日：2007-11-29

申请人： Seung-Bin You ,  Chun-Kyun Seok ,  Yong-Jin Cho

发明人： Seung-Bin You ,  Chun-Kyun Seok ,  Yong-Jin Cho

IPC分类号： H03F3/38 ,  G05F1/44

CPC分类号： G05F1/56 ,  H03F3/38

摘要： A voltage regulator includes a voltage driving circuit and a current sinking unit. The voltage driving circuit is controlled to maintain an output signal at an output node. The current sinking unit is coupled to the output node for generating a sinking current for diverting an external current to the output node. An error amplifier generates a control signal from the output signal and a reference signal. The voltage driving circuit and the current sinking unit are controlled according to such a control signal.

摘要翻译： 电压调节器包括电压驱动电路和电流吸收单元。 控制电压驱动电路以在输出节点处保持输出信号。 电流吸收单元耦合到输出节点，用于产生用于将外部电流转向输出节点的吸收电流。 误差放大器从输出信号和参考信号产生控制信号。 电压驱动电路和电流吸收单元根据这样的控制信号进行控制。