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1. 发明公开

KR1020020034677A 고효율 스위칭 증폭기 失效
标题翻译：高效开关放大器
公开(公告)号：KR1020020034677A
公开(公告)日：2002-05-09
申请号：KR1020000065133
申请日：2000-11-03
申请人： 엔시트론 주식회사 , 최영하 , 이덕수 , 박경수 , 두세진
发明人： 두세진 , 이덕수 , 최영하 , 박경수
IPC分类号： H03F3/217
摘要： PURPOSE: A high efficiency switching amplifier is provided, which reduce a noise and a nonlinear distortion by reducing a heat generation and increasing efficiency by performing the switching with a low power supply voltage when an input voltage is small. CONSTITUTION: The switching amplifier has an amplitude detector(17) detecting an amplitude of an input signal, and a PWM(Pulse Width Modulation) generator varying a modulation depth of a PWM waveform generated according to a voltage region of an input signal by comparing the amplitude of the input signal with a constant threshold value. A plurality of power supply devices(21,22) vary a PWM output voltage being output according to the amplitude of the input signal. And an output filter circuit filters the PWM switching output voltage through a low pass filter to make it an analog waveform.
摘要翻译：目的：提供一种高效率的开关放大器，通过在输入电压较小时通过低电源电压进行开关来减少发热并提高效率，从而降低噪声和非线性失真。构成：开关放大器具有检测输入信号的幅度的幅度检测器（17），以及PWM（脉宽调制）发生器，通过比较输入信号的电压区域来改变根据输入信号的电压区域生成的PWM波形的调制深度具有恒定阈值的输入信号的幅度。多个电源装置（21,22）根据输入信号的幅度改变输出的PWM输出电压。并且输出滤波器电路通过低通滤波器对PWM开关输出电压进行滤波，使其成为模拟波形。

2. 发明公开

KR1020040098925A 싱글 엔드 디지털앰프에서의 팝노이즈 제거방법 및 그시스템 失效
标题翻译：在单端数字放大器中移除POP噪声的方法和系统，涉及移除音频噪声时，在单端模式下操作单端数字放大器时，电源开/关时发生故障
公开(公告)号：KR1020040098925A
公开(公告)日：2004-11-26
申请号：KR1020030031253
申请日：2003-05-16
申请人： 엔시트론 주식회사 , 김민수 , 최영하 , 박경수
发明人： 최영하 , 박경수 , 김민수
IPC分类号： H03K17/16
CPC分类号： H03F1/305 , H03F3/2171 , H03F2200/03 , H03F2200/351
摘要： PURPOSE: A method and a system for removing pop noise in a single-ended digital amplifier are provided to reduce or remove the pop noise by changing only a signal supply order. CONSTITUTION: A method for removing pop noise in a single-ended digital amplifier includes a process for supplying logic driving power, a process for supplying a PWM(Pulse Width Modulation) signal, and a process for supplying a transistor operating voltage. The process for supplying logic driving power is to supply the logic driving power to operate a digital amplifier. The process for supplying a PWM signal is to supply a PWM signal modulated by a PWM processor to an input unit of the PWM amplifier. The process for supplying the transistor operating voltage is to apply the transistor operating voltage to the PWM amplifier after the PWM signal is supplied to the input unit of the PWM amplifier.
摘要翻译：目的：提供一种用于消除单端数字放大器中的爆音噪声的方法和系统，以通过仅改变信号供应顺序来减少或消除爆音噪声。构成：用于消除单端数字放大器中的弹出噪声的方法包括用于提供逻辑驱动功率的处理，用于提供PWM（脉宽调制）信号的处理以及提供晶体管工作电压的处理。提供逻辑驱动功率的过程是提供用于操作数字放大器的逻辑驱动功率。提供PWM信号的过程是将由PWM处理器调制的PWM信号提供给PWM放大器的输入单元。提供晶体管工作电压的过程是在将PWM信号提供给PWM放大器的输入单元之后，将晶体管工作电压施加到PWM放大器。

3. 发明公开

KR1020020000368A 실계수 디지털 잡음성형필터 및 그 제조방법 有权
标题翻译：真数数字噪声滤波器及其制作方法
公开(公告)号：KR1020020000368A
公开(公告)日：2002-01-05
申请号：KR1020000034951
申请日：2000-06-23
申请人： 엔시트론 주식회사 , 최영하 , 이덕수 , 박경수 , 두세진
发明人： 이덕수 , 최영하 , 두세진 , 박경수 , 성굉모
IPC分类号： H03K5/125
CPC分类号： H03M7/3042 , H03M7/3028
摘要： PURPOSE: A real number coefficient digital noise shaping filter and a fabricating method thereof are provided to improve noise restraint capacity by using real number coefficients as coefficients of a noise transfer function. CONSTITUTION: A digital noise shaping filter of a delta-sigma code converter is characterized in that coefficients of a noise transfer function is real numbers. The coefficients of the noise transfer function are obtained by defining an object function to evaluate quantitatively capacity of the noise shaping filter, finding a real number coefficient condition to optimize the object function, and calculating the optimized real number coefficients. In a method for fabricating the digital noise shaping filter, the object function is defined. The real number coefficient condition for optimizing the object function is found. The optimized real number coefficients is calculated. Compared with an existing noise shaping filter, the real number coefficient digital noise shaping filter is prominent in a gain shaping gain and noise restraint capacity.
摘要翻译：目的：提供实数系数数字噪声整形滤波器及其制造方法，通过使用实数系数作为噪声传递函数的系数来提高噪声抑制能力。构成：Δ-Σ码转换器的数字噪声整形滤波器的特征在于噪声传递函数的系数是实数。噪声传递函数的系数通过定义目标函数来评估噪声整形滤波器的定量容量，找到实数系数条件来优化目标函数，以及计算优化的实数系数。在制造数字噪声整形滤波器的方法中，定义了目标函数。找到用于优化目标函数的实数系数条件。计算优化的实数系数。与现有的噪声整形滤波器相比，实数数字噪声整形滤波器在增益整形增益和噪声抑制能力方面是突出的。

4. 发明授权

KR100516014B1 ＰＷＭ 입력신호들의 위상들이 다른 다중채널 디지털앰프 有权
标题翻译：多通道数字放大器，用于PWM输入信号的相移
公开(公告)号：KR100516014B1
公开(公告)日：2005-09-26
申请号：KR1020010031544
申请日：2001-06-05
申请人： 엔시트론 주식회사 , 최영하
发明人： 최영하 , 박경수 , 성굉모
IPC分类号： H03F3/38
CPC分类号： H03F3/2171
摘要： 본 발명은 다중채널 디지털앰프에 대한 것으로, 각 채널들의 소출력 PWM신호들의 위상을 이동시켜 스위칭회로부의 반도체 스위칭소자의 온/오프 시간을 달리하는, PWM 입력신호들의 위상들이 다른 다중채널 디지털앰프에 대한 것이다. 본 발명에 따른 PWM 입력신호들의 위상들이 다른 다중채널 디지털앰프는 종래의 크로스 토크현상을 최소화하고 잡음을 현저히 감소시켜 디지털앰프의 성능을 향상시킬 수 있다.

5. 发明公开

KR1020020092750A ＰＷＭ 입력신호들의 위상들이 다른 다중채널 디지털앰프 有权
标题翻译：用于放大PWM输入信号的多通道数字放大器
公开(公告)号：KR1020020092750A
公开(公告)日：2002-12-12
申请号：KR1020010031544
申请日：2001-06-05
申请人： 엔시트론 주식회사 , 최영하
发明人： 최영하 , 박경수 , 성굉모
IPC分类号： H03F3/38
CPC分类号： H03F3/2171
摘要： PURPOSE: A multi-channel digital amplifier for amplifying PWM(Pulse Width Modulation) input signals of different phases is provided to minimize a cross-talk phenomenon by shifting phases of PWM signals of small outputs and varying on-off time of a semiconductor switching device. CONSTITUTION: A PWM converter portion converts an input signal to PWM signals of small outputs of N number where N is integer of 2 or more. A switching circuit portion amplifies the PWM signals of small outputs of N number and outputs the PWM signals of large outputs of N number. A low pass filter converts the PWM signals of large outputs of N number to analog signals. A semiconductor switching device of the switching portion has a different turning-on/off time since the PWM signals of small outputs of N number have different phases. In addition, the PWM converter portion changes the phases of the PWM signals by shifting the phases of the PWM signals.
摘要翻译：目的：提供用于放大不同相位的PWM（脉宽调制）输入信号的多通道数字放大器，通过移动小输出的PWM信号的相位和半导体开关器件的变化的导通截止时间来减少串扰现象。构成：PWM转换器部分将输入信号转换成N个小输出的PWM信号，其中N是2或更大的整数。开关电路部分放大N号的小输出的PWM信号，并输出N个大输出的PWM信号。低通滤波器将N个大输出的PWM信号转换为模拟信号。由于N号的小输出的PWM信号具有不同的相位，所以开关部的半导体开关器件具有不同的导通/截止时间。此外，PWM转换器部通过移位PWM信号的相位来改变PWM信号的相位。

6. 发明授权

KR100365136B1 실계수 디지털 잡음성형필터 및 그 제조방법 有权
标题翻译： 실계수디지털잡음성형필터및그제조방법
公开(公告)号：KR100365136B1
公开(公告)日：2003-01-24
申请号：KR1020000034951
申请日：2000-06-23
申请人： 엔시트론 주식회사 , 최영하 , 이덕수 , 박경수 , 두세진
发明人： 이덕수 , 최영하 , 두세진 , 박경수 , 성굉모
IPC分类号： H03K5/125
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 +a2z +Lambda+aNz . 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位数字/模拟转换器，1位模拟/数字转换器等的用于Δ-Σ数据转换器的具有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进的噪声抑制性能和系统稳定性并降低了计算复杂度。为此，数字噪声整形滤波器包括由NTF（z）= - 1 + a1z -1 + a 2z -2 +λ+ aN z -N表示的噪声传递函数。噪声传递函数具有最佳的实系数或实系数逼近它们。

7. 发明授权

KR100502843B1 싱글 엔드 디지털앰프에서의 팝노이즈 제거방법 및 그시스템 失效
标题翻译：单端数字放大器中流声噪声的去除方法及其系统
公开(公告)号：KR100502843B1
公开(公告)日：2005-07-21
申请号：KR1020030031253
申请日：2003-05-16
申请人： 엔시트론 주식회사 , 김민수 , 최영하 , 박경수
发明人： 최영하 , 박경수 , 김민수
IPC分类号： H03K17/16
摘要： 본 발명은 디지털앰프의 전원을 온/오프시킬때 발생하는 팝노이즈를 제거하는 방법과 시스템에 관한 것으로서, 펄스폭변조 앰프의 트랜지스터 동작전원의 공급전에 펄스폭변조 신호를 먼저 공급하고, 펄스폭변조 앰프의 트랜지스터 동작전원의 차단후에 펄스폭변조 신호를 일정 시간동안 계속해서 공급해줌으로써, 팝노이즈를 제거하는 방법과 시스템을 제공한다.
한편, 본 발명은 디지털앰프의 전원을 오프시키는 경우, 전원공급부로 부터 공급되는 로직 구동용 전원을 일정시간동안 유지시켜, 전원 오프시의 팝노이즈를 감소시키거나 제거시킬 수 있다.

8. 发明授权

KR100453708B1 고효율 스위칭 증폭기 失效
标题翻译： 고효율스위칭증폭기
公开(公告)号：KR100453708B1
公开(公告)日：2004-10-20
申请号：KR1020000065133
申请日：2000-11-03
申请人： 엔시트론 주식회사 , 최영하 , 이덕수 , 박경수 , 두세진
发明人： 두세진 , 이덕수 , 최영하 , 박경수
IPC分类号： H03F3/217
摘要： PURPOSE: A high efficiency switching amplifier is provided, which reduce a noise and a nonlinear distortion by reducing a heat generation and increasing efficiency by performing the switching with a low power supply voltage when an input voltage is small. CONSTITUTION: The switching amplifier has an amplitude detector(17) detecting an amplitude of an input signal, and a PWM(Pulse Width Modulation) generator varying a modulation depth of a PWM waveform generated according to a voltage region of an input signal by comparing the amplitude of the input signal with a constant threshold value. A plurality of power supply devices(21,22) vary a PWM output voltage being output according to the amplitude of the input signal. And an output filter circuit filters the PWM switching output voltage through a low pass filter to make it an analog waveform.
摘要翻译：目的：提供一种高效率开关放大器，其通过在输入电压较小时通过以低电源电压执行开关来减少发热和提高效率来减少噪声和非线性失真。构成：开关放大器具有检测输入信号的振幅的振幅检测器（17），以及根据输入信号的电压区域而生成的PWM波形的调制深度变化的PWM（Pulse Width Modulation，脉冲宽度调制）输入信号的幅度与一个恒定的阈值。多个电源装置（21,22）根据输入信号的幅度改变输出的PWM输出电压。输出滤波器电路通过低通滤波器对PWM开关输出电压进行滤波，使其成为模拟波形。

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