公开(公告)号：US08452025B2

公开(公告)日：2013-05-28

申请号：US13041781

申请日：2011-03-07

申请人： Yeongha Choi ,  Jin Ho Oh ,  Min Soo Kim ,  Jae-Hee Won

发明人： Yeongha Choi ,  Jin Ho Oh ,  Min Soo Kim ,  Jae-Hee Won

IPC分类号： H04R1/10 ,  H04B3/00 ,  H04M1/00

CPC分类号： H03F1/30 ,  H03F2200/03 ,  H03F2200/78

摘要： A power supply circuit including a voltage regulator and a headphone driving circuit employing the same are disclosed. In accordance with the present invention, the power supply circuit may provide stable power supply to the amplifier since the power supply circuit generates the constant voltage +Vreg and the constant voltage −Vreg from +VDD robust to stronger than a power noise, and the balanced signal path for isolating the noise of the input signal to be amplified is not required, thereby simplifying the constitution of the circuit.

摘要翻译： 公开了一种包括电压调节器和采用其的耳机驱动电路的电源电路。 根据本发明，电源电路可以向放大器提供稳定的电源，因为电源电路产生恒定电压+ Vreg，并且恒定电压-Vreg从+ VDD鲁棒到强于功率噪声，并且平衡 不需要用于隔离要放大的输入信号的噪声的信号路径，从而简化了电路的结构。

公开(公告)号：US08600076B2

公开(公告)日：2013-12-03

申请号：US12938586

申请日：2010-11-03

申请人： Yeongha Choi ,  Min Soo Kim

发明人： Yeongha Choi ,  Min Soo Kim

IPC分类号： H03G3/00 ,  H04R25/00

CPC分类号： H03G9/18 ,  H03G9/005

摘要： A multiband DRC system and a method for controlling the same are disclosed. In accordance with the present invention, the system and the method are capable of increasing an overall loudness of an output signal by controlling thresholds and gains of plurality of DRCs included in the multiband DRC system according to frequency bands.

摘要翻译： 公开了一种多频带DRC系统及其控制方法。 根据本发明，系统和方法能够通过根据频带控制包括在多频带DRC系统中的多个DRC的阈值和增益来增加输出信号的总响度。

公开(公告)号：US20080205661A1

公开(公告)日：2008-08-28

申请号：US11855421

申请日：2007-09-14

申请人： Chonghoon KIM ,  Yeongha CHOI ,  Hyungchae KIM

发明人： Chonghoon KIM ,  Yeongha CHOI ,  Hyungchae KIM

IPC分类号： H04B3/20

CPC分类号： H04B3/23 ,  H04B7/15585

摘要： A system and a method for canceling an echo is disclosed. In accordance with the system and the method, a plurality of independently and variably delayed adaptive algorithm blocks are selectively applied to a delayed feedback signal to generate a plurality of echo components in parallel, thereby canceling the echo component from an input signal.

摘要翻译： 公开了一种用于消除回波的系统和方法。 根据系统和方法，多个独立且可变地延迟的自适应算法块被选择性地应用于延迟的反馈信号以并行产生多个回波分量，从而从输入信号中消除回波分量。

公开(公告)号：US08155303B2

公开(公告)日：2012-04-10

申请号：US11855421

申请日：2007-09-14

申请人： Chonghoon Kim ,  Yeongha Choi ,  Hyungchae Kim

发明人： Chonghoon Kim ,  Yeongha Choi ,  Hyungchae Kim

IPC分类号： H04M9/08 ,  H04B7/14 ,  H04B1/44 ,  H04B3/20

CPC分类号： H04B3/23 ,  H04B7/15585

摘要： A system and a method for canceling an echo is disclosed. In accordance with the system and the method, a plurality of independently and variably delayed adaptive algorithm blocks are selectively applied to a delayed feedback signal to generate a plurality of echo components in parallel, thereby canceling the echo component from an input signal.

摘要翻译： 公开了一种用于消除回波的系统和方法。 根据系统和方法，多个独立且可变地延迟的自适应算法块被选择性地应用于延迟的反馈信号以并行产生多个回波分量，从而从输入信号中消除回波分量。

公开(公告)号：US20110181356A1

公开(公告)日：2011-07-28

申请号：US13014082

申请日：2011-01-26

申请人： Yeongha CHOI ,  Minsoo KIM ,  Sungil KIM ,  Seokil JEONG

发明人： Yeongha CHOI ,  Minsoo KIM ,  Sungil KIM ,  Seokil JEONG

IPC分类号： H03F3/217

CPC分类号： H03F3/2173

摘要： A switching device of a digital amplifier and a method for controlling the same are disclosed. In accordance with the present invention, a linearity is maintain even for a short pulse width since a data signal having a pulse width shorter than a predetermined length. Moreover, when an MLP signal is located at both sides of a compensating signal without overlapping with each other, a problem due to a common mode may be prevented.

摘要翻译： 公开了数字放大器的开关装置及其控制方法。 根据本发明，由于脉冲宽度短于预定长度的数据信号，因此即使对于短脉冲宽度也保持线性。 此外，当MLP信号位于补偿信号的两侧而不重叠时，可以防止由共模引起的问题。

公开(公告)号：US20110110533A1

公开(公告)日：2011-05-12

申请号：US12938586

申请日：2010-11-03

申请人： Yeongha CHOI ,  Min Soo KIM

发明人： Yeongha CHOI ,  Min Soo KIM

IPC分类号： H03G5/00

CPC分类号： H03G9/18 ,  H03G9/005

摘要： A multiband DRC system and a method for controlling the same are disclosed. In accordance with the present invention, the system and the method are capable of increasing an overall loudness of an output signal by controlling thresholds and gains of plurality of DRCs included in the multiband DRC system according to frequency bands.

摘要翻译： 公开了一种多频带DRC系统及其控制方法。 根据本发明，系统和方法能够通过根据频带控制包括在多频带DRC系统中的多个DRC的阈值和增益来增加输出信号的总响度。

公开(公告)号：US08283976B2

公开(公告)日：2012-10-09

申请号：US13014082

申请日：2011-01-26

申请人： Yeongha Choi ,  Minsoo Kim ,  Sungil Kim ,  Seokil Jeong

发明人： Yeongha Choi ,  Minsoo Kim ,  Sungil Kim ,  Seokil Jeong

IPC分类号： H03F3/38

CPC分类号： H03F3/2173

摘要： A switching device of a digital amplifier and a method for controlling the same are disclosed. In accordance with the present invention, a linearity is maintain even for a short pulse width since a data signal having a pulse width shorter than a predetermined length. Moreover, when an MLP signal is located at both sides of a compensating signal without overlapping with each other, a problem due to a common mode may be prevented.

摘要翻译： 公开了数字放大器的开关装置及其控制方法。 根据本发明，由于脉冲宽度短于预定长度的数据信号，因此即使对于短脉冲宽度也保持线性。 此外，当MLP信号位于补偿信号的两侧而不重叠时，可以防止由共模引起的问题。

公开(公告)号：US20110222702A1

公开(公告)日：2011-09-15

申请号：US13041781

申请日：2011-03-07

申请人： Yeongha CHOI ,  Jin Ho OH ,  Min Soo KIM ,  Jae-Hee WON

发明人： Yeongha CHOI ,  Jin Ho OH ,  Min Soo KIM ,  Jae-Hee WON

IPC分类号： H04R1/10 ,  G05F1/10

CPC分类号： H03F1/30 ,  H03F2200/03 ,  H03F2200/78

摘要： A power supply circuit including a voltage regulator and a headphone driving circuit employing the same are disclosed. In accordance with the present invention, the power supply circuit may provide stable power supply to the amplifier since the power supply circuit generates the constant voltage +Vreg and the constant voltage −Vreg from +VDD robust to stronger than a power noise, and the balanced signal path for isolating the noise of the input signal to be amplified is not required, thereby simplifying the constitution of the circuit

摘要翻译： 公开了一种包括电压调节器和采用其的耳机驱动电路的电源电路。 根据本发明，电源电路可以向放大器提供稳定的电源，因为电源电路产生恒定电压+ Vreg，并且恒定电压-Vreg从+ VDD鲁棒到强于功率噪声，并且平衡 不需要用于隔离要放大的输入信号的噪声的信号路径，从而简化了电路的结构

公开(公告)号：US06657572B2

公开(公告)日：2003-12-02

申请号：US10069340

申请日：2002-05-07

申请人： Ducksoo Lee ,  Yeongha Choi ,  Sejin Doo ,  Kyoungsoo Park ,  Koeng-Mo Sung

发明人： Ducksoo Lee ,  Yeongha Choi ,  Sejin Doo ,  Kyoungsoo Park ,  Koeng-Mo Sung

IPC分类号： H03M300

CPC分类号： H03M7/3042 ,  H03M7/3028

摘要： A digital noise-shaping filter with real coefficients for delta-sigma data converters used in a digital amplifier, 1-bit digital/analog converter, 1-bit analog/digital converter and the like, and a method for making the same. The present digital noise-shaping filter has improved noise suppression performance and system stability and reduced calculation complexity. To this end, the digital noise-shaping filter comprises a noise transfer function expressed by NTF(z)=−1+a1z−1+a2z−2+&Lgr;+aNz−N. The noise transfer function has optimum real coefficients or real coefficients approximating them.

摘要翻译： 用于数字放大器，1位数/模转换器，1位模拟/数字转换器等的用于Δ-Σ数据转换器的实系数的数字噪声整形滤波器及其制造方法。 目前的数字噪声整形滤波器具有改善的噪声抑制性能和系统稳定性，降低了计算复杂度。 为此，数字噪声整形滤波器包括由NTF（z）= - 1 + a1z -1 + a2z + 2 + Lambda + aNz <-N>表示的噪声传递函数。 噪声传递函数具有最佳实数系数或逼近它们的实数。