公开(公告)号：US07313244B2

公开(公告)日：2007-12-25

申请号：US10527677

申请日：2003-09-09

申请人： Tae Ha Ryoo ,  Byung Tak Jang ,  Ji-yeoul Ryoo

发明人： Tae Ha Ryoo ,  Byung Tak Jang ,  Ji-yeoul Ryoo

IPC分类号： H04B15/00

CPC分类号： H03F1/305 ,  H03G3/348 ,  H04B1/1661

摘要： Provided are a circuit for and a method of eliminating pop noise in a digital audio amplifier using dual power supply, which are simple, drop in price, and can be readily implemented in a semiconductor chip. According to an existing technique, pop noise is eliminated using a relay. However, in the present circuit and method, pop noise is eliminated using the small number of discrete electronic devices. The circuit for eliminating pop noise controls a voltage at a gate of a power switch, i.e., a power MOS transistor, when power supply voltages are applied and the application of power supply voltages is stopped.

摘要翻译： 提供了一种使用双电源消除数字音频放大器中的流行噪声的电路和方法，该电源简单，价格低廉，并且可以容易地在半导体芯片中实现。 根据现有的技术，使用继电器来消除爆音噪声。 然而，在本电路和方法中，使用少量的分立电子设备来消除弹出噪声。 用于消除爆音噪声的电路在施加电源电压并停止施加电源电压时控制功率开关的栅极即功率MOS晶体管的电压。

公开(公告)号：US07436042B2

公开(公告)日：2008-10-14

申请号：US10529695

申请日：2003-09-29

申请人： Tae Ha Ryoo ,  Byung Tak Jang

发明人： Tae Ha Ryoo ,  Byung Tak Jang

IPC分类号： H01L29/93

CPC分类号： H03K17/6872 ,  H03F3/2171

摘要： A circuit for driving a gate of a power metal-oxide semiconductor field effect transistor (MOSFET), which uses a higher voltage than a gate controller is provided. The circuit is able to safely and effectively transmits an output signal of a gate controller irrespective of a frequency and a duty-cycle of the output signal when transmitting the output signal of the gate controller to the power MOSFET using a higher voltage than the gate controller. Accordingly, the circuit is suitable for a case where the duty-cycle of the output signal of the gate controller dramatically changes and the frequency is irregular.

摘要翻译： 提供了用于驱动功率金属氧化物半导体场效应晶体管（MOSFET）的栅极的电路，其使用比栅极控制器更高的电压。 当使用比门控制器更高的电压将门控制器的输出信号发送到功率MOSFET时，该电路能够安全且有效地传输门控制器的输出信号，而不管输出信号的频率和占空比 。 因此，该电路适用于栅极控制器的输出信号的占空比显着变化且频率不规则的情况。

公开(公告)号：US20060126864A1

公开(公告)日：2006-06-15

申请号：US10527677

申请日：2003-09-09

申请人： Tae Ha Ryoo ,  Byung Tak Jang

发明人： Tae Ha Ryoo ,  Byung Tak Jang

IPC分类号： H04B15/00

CPC分类号： H03F1/305 ,  H03G3/348 ,  H04B1/1661

摘要： Provided are a circuit for and a method of eliminating pop noise in a digital audio amplifier using dual power supply, which are simple, drop in price, and can be readily implemented in a semiconductor chip. According to an existing technique, pop noise is eliminated using a relay. However, in the present circuit and method, pop noise is eliminated using the small number of discrete electronic devices. The circuit for eliminating pop noise controls a voltage at a gate of a power switch, i.e., a power MOS transistor, when power supply voltages are applied and the application of power supply voltages is stopped.

摘要翻译： 提供了一种使用双电源消除数字音频放大器中的流行噪声的电路和方法，该电源简单，价格低廉，并且可以容易地在半导体芯片中实现。 根据现有的技术，使用继电器来消除爆音噪声。 然而，在本电路和方法中，使用少量的分立电子设备来消除弹出噪声。 用于消除爆音噪声的电路在施加电源电压并停止施加电源电压时控制功率开关的栅极即功率MOS晶体管的电压。

公开(公告)号：US07196580B2

公开(公告)日：2007-03-27

申请号：US10530977

申请日：2003-10-10

申请人： Tae Ha Ryoo ,  Byung Tak Jang

发明人： Tae Ha Ryoo ,  Byung Tak Jang

IPC分类号： H03F3/217

CPC分类号： H03F3/2171 ,  H03F1/086

摘要： Provided is a digital audio amplifier capable of increasing self-oscillation frequency by using a phase lead-lag compensator. The digital audio amplifier includes the phase lead-lag compensator which increases the self-oscillation frequency by lead-lag-compensating for the phase of an output signal and making a feedback of the compensated output signal. In addition, the digital audio amplifier further includes a bandwidth control means which controls the bandwidth of an error amplifier. Accordingly, the digital audio amplifier can adjust the self-oscillation frequency and reduce the extent to which the self-oscillation frequency varies in accordance with the variation of the output signal by using the bandwidth control means that inserts a pole into the error amplifier.

摘要翻译： 提供了能够通过使用相位超前滞后补偿器来增加自振频率的数字音频放大器。 数字音频放大器包括相位超前滞后补偿器，通过对输出信号的相位进行超前延迟补偿并产生补偿的输出信号的反馈来增加自振频率。 此外，数字音频放大器还包括控制误差放大器带宽的带宽控制装置。 因此，数字音频放大器可以通过使用将极插入误差放大器的带宽控制装置来调节自振荡频率并且根据输出信号的变化减小自振荡频率变化的程度。

公开(公告)号：US06727642B1

公开(公告)日：2004-04-27

申请号：US09646730

申请日：2000-09-20

申请人： Gyu Hyeong Cho ,  Nam Sung Jung ,  Gyun Chae ,  Tae Ha Ryoo ,  Jon Woon Hong ,  Seung Tak Ryu ,  Young Ki Kim

发明人： Gyu Hyeong Cho ,  Nam Sung Jung ,  Gyun Chae ,  Tae Ha Ryoo ,  Jon Woon Hong ,  Seung Tak Ryu ,  Young Ki Kim

IPC分类号： H01J162

CPC分类号： H01J1/304 ,  H01J2201/319 ,  H01J2329/00

摘要： Disclosed are flat panel field emitter displays whose unit cell structure adopt a planar cathode structure in stead of a conventional microtip structure, so as to increase the degree of integration and can be operated at low operation voltages at high speeds. In the structure, a channel insulator is formed below the cathode and underlaid by a gate. By means of the gate voltage, the electron emission from the cathode can be controlled. The electrodes in the structure are arranged in the order of anode, cathode and gate, allowing the simplification of processes. With the ease of controlling the distance between electrodes, the displays can be applied for almost all video systems from small sizes to large screen area displays, in place of conventional displays. The displays allows conventional semiconductor processes and facilities to be utilized as they are.

摘要翻译： 公开了平板型场发射体显示器，其单体电池结构采用平面阴极结构代替常规微尖端结构，从而提高集成度，并可在高速下在低工作电压下工作。 在该结构中，沟槽绝缘体形成在阴极下方并由栅极覆盖。 通过栅极电压，可以控制来自阴极的电子发射。 结构中的电极按阳极，阴极和栅极的顺序排列，允许简化工艺。 通过容易地控制电极之间的距离，显示器可以应用于从小尺寸到大屏幕区域显示器的几乎所有的视频系统，代替传统的显示器。 这些显示器允许常规的半导体工艺和设备被使用。

公开(公告)号：US06737917B2

公开(公告)日：2004-05-18

申请号：US10221891

申请日：2002-09-17

申请人： Tae Ha Ryoo ,  Chan Kim ,  Nam In Kim

发明人： Tae Ha Ryoo ,  Chan Kim ,  Nam In Kim

IPC分类号： H03F338

CPC分类号： H03F3/2171

摘要： The present invention relates to amplifier combined digital amplifier using pulse width modulation and analog amplifier, and more particularly, to amplifier converting the analog input signal to pulse width modulation signal by comparing the analog input signal with triangle-wave, inputting the pulse width modulation signal to a dead time logic circuit, controlling the “ON”, and “OFF” operation of output transistor by output signal of the dead time logic circuit and converting the pulse width modulation signal of the output transistor to amplified analog signal using LC low pass filter. The present invention reduces the loss of efficiency of output transistor. Therefore the size of heat radiating plate can be easily reduced and amplifier with compact size can be accomplished by the present invention.

摘要翻译： 本发明涉及使用脉冲宽度调制和模拟放大器的放大器组合数字放大器，更具体地，涉及通过将模拟输入信号与三角波进行比较来将模拟输入信号转换为脉宽调制信号的放大器，输入脉宽调制信号 到死区逻辑电路，通过死区时间逻辑电路的输出信号控制输出晶体管的“ON”和“OFF”运算，并将LC输出晶体管的脉宽调制信号转换为放大模拟信号，使用LC低通滤波器 。 本发明降低了输出晶体管的效率损失。 因此，散热板的尺寸可以容易地减小，并且通过本发明可以实现具有紧凑尺寸的放大器。