公开(公告)号：US08730402B2

公开(公告)日：2014-05-20

申请号：US13450035

申请日：2012-04-18

申请人： Sang Ho Kim ,  Ho Jin Park ,  Hyung Woan Koo ,  Ki Ho Lee

发明人： Sang Ho Kim ,  Ho Jin Park ,  Hyung Woan Koo ,  Ki Ho Lee

IPC分类号： H04N5/455

CPC分类号： H04N21/42607 ,  H04N5/14 ,  H04N5/455 ,  H04N5/46 ,  H04N5/50 ,  H04N5/60 ,  H04N21/42638 ,  H04N21/42676 ,  H04N21/439

摘要： Provided is an analog front end of a digital TV, a digital TV system having the same, and a method of operating the same. The analog front end includes: a first selection circuit which selectively outputs differential sound intermediate frequency signals or differential TV broadcast signals in response to a first selection signal; a second selection circuit which outputs a clock signal among a plurality of clock signals having a different sampling frequencies, in response to a second selection signal; and an analog-to-digital converter which converts output signals output from the first selection circuit to a digital code, according to a sampling frequency of a clock signal output from the second selection circuit.

摘要翻译： 提供了数字电视的模拟前端，具有该数字电视的数字电视系统及其操作方法。 模拟前端包括：第一选择电路，其响应于第一选择信号选择性地输出差分声音中频信号或差分TV广播信号; 第二选择电路，响应于第二选择信号，在具有不同采样频率的多个时钟信号中输出时钟信号; 以及根据从第二选择电路输出的时钟信号的采样频率，将从第一选择电路输出的输出信号转换为数字码的模数转换器。

公开(公告)号：US07157941B2

公开(公告)日：2007-01-02

申请号：US11415465

申请日：2006-05-01

申请人： Hyung-Woan Koo

发明人： Hyung-Woan Koo

IPC分类号： H03K19/20

CPC分类号： H03K17/04106 ,  H03M1/685 ,  H03M1/687 ,  H03M1/745 ,  H03M1/747

摘要： A differential switching circuit has a first transistor connected between a first output node and a common node and a second transistor connected between a second output node and the common node. A switching driver generates first and second driving signals in response to an input data signal so as to complementarily drive the first and second transistors. A voltage level of at least one of the first and second driving signals is maintained so as to cause at least one of the first and second transistors to operate in a saturation region regardless of a voltage variation of at least one of the first or second output nodes when the at least one of the first and second transistors is turned on. Output impedance of the device is enhanced because the first and second transistors operate in the saturation region.

摘要翻译： 差分开关电路具有连接在第一输出节点和公共节点之间的第一晶体管，以及连接在第二输出节点和公共节点之间的第二晶体管。 开关驱动器响应于输入数据信号产生第一和第二驱动信号，以互补地驱动第一和第二晶体管。 维持第一和第二驱动信号中的至少一个的电压电平，以使得第一和第二晶体管中的至少一个在饱和区域中工作，而与第一或第二输出中的至少一个的电压变化无关 当第一和第二晶体管中的至少一个被接通时的节点。 由于第一和第二晶体管在饱和区域中工作，器件的输出阻抗得到了增强。

公开(公告)号：US20120268657A1

公开(公告)日：2012-10-25

申请号：US13450035

申请日：2012-04-18

申请人： Sang Ho KIM ,  Ho Jin PARK ,  Hyung Woan KOO ,  Ki Ho LEE

发明人： Sang Ho KIM ,  Ho Jin PARK ,  Hyung Woan KOO ,  Ki Ho LEE

IPC分类号： H04N5/60 ,  H03D3/24 ,  H04N5/50 ,  H04N5/455

CPC分类号： H04N21/42607 ,  H04N5/14 ,  H04N5/455 ,  H04N5/46 ,  H04N5/50 ,  H04N5/60 ,  H04N21/42638 ,  H04N21/42676 ,  H04N21/439

摘要： Provided is an analog front end of a digital TV, a digital TV system having the same, and a method of operating the same. The analog front end includes: a first selection circuit which selectively outputs differential sound intermediate frequency signals or differential TV broadcast signals in response to a first selection signal; a second selection circuit which outputs a clock signal among a plurality of clock signals having a different sampling frequencies, in response to a second selection signal; and an analog-to-digital converter which converts output signals output from the first selection circuit to a digital code, according to a sampling frequency of a clock signal output from the second selection circuit.

摘要翻译： 提供了数字电视的模拟前端，具有该数字电视的数字电视系统及其操作方法。 模拟前端包括：第一选择电路，其响应于第一选择信号选择性地输出差分声音中频信号或差分TV广播信号; 第二选择电路，响应于第二选择信号，在具有不同采样频率的多个时钟信号中输出时钟信号; 以及根据从第二选择电路输出的时钟信号的采样频率，将从第一选择电路输出的输出信号转换为数字码的模数转换器。

公开(公告)号：US20060192590A1

公开(公告)日：2006-08-31

申请号：US11415465

申请日：2006-05-01

申请人： Hyung-Woan Koo

发明人： Hyung-Woan Koo

IPC分类号： H03K19/094

CPC分类号： H03K17/04106 ,  H03M1/685 ,  H03M1/687 ,  H03M1/745 ,  H03M1/747

摘要： A differential switching circuit has a first transistor connected between a first output node and a common node and a second transistor connected between a second output node and the common node. A switching driver generates first and second driving signals in response to an input data signal so as to complementarily drive the first and second transistors. A voltage level of at least one of the first and second driving signals is maintained so as to cause at least one of the first and second transistors to operate in a saturation region regardless of a voltage variation of at least one of the first or second output nodes when the at least one of the first and second transistors is turned on. Output impedance of the device is enhanced because the first and second transistors operate in the saturation region.

摘要翻译： 差分开关电路具有连接在第一输出节点和公共节点之间的第一晶体管，以及连接在第二输出节点和公共节点之间的第二晶体管。 开关驱动器响应于输入数据信号产生第一和第二驱动信号，以互补地驱动第一和第二晶体管。 维持第一和第二驱动信号中的至少一个的电压电平，以使得第一和第二晶体管中的至少一个在饱和区域中工作，而与第一或第二输出中的至少一个的电压变化无关 当第一和第二晶体管中的至少一个被接通时的节点。 由于第一和第二晶体管在饱和区域中工作，器件的输出阻抗得到了增强。

公开(公告)号：US20050128117A1

公开(公告)日：2005-06-16

申请号：US11008532

申请日：2004-12-09

申请人： Hyung-Woan Koo

发明人： Hyung-Woan Koo

IPC分类号： H03K3/011 ,  H03K17/041 ,  H03M1/68 ,  H03M1/74 ,  H03M1/66

CPC分类号： H03K17/04106 ,  H03M1/685 ,  H03M1/687 ,  H03M1/745 ,  H03M1/747

摘要： A differential switching circuit has a first transistor connected between a first output node and a common node and a second transistor connected between a second output node and the common node. A switching driver generates first and second driving signals in response to an input data signal so as to complementarily drive the first and second transistors. A voltage level of at least one of the first and second driving signals is maintained so as to cause at least one of the first and second transistors to operate in a saturation region regardless of a voltage variation of at least one of the first or second output nodes when the at least one of the first and second transistors is turned on. Output impedance of the device is enhanced because the first and second transistors operate in the saturation region.

摘要翻译： 差分开关电路具有连接在第一输出节点和公共节点之间的第一晶体管，以及连接在第二输出节点和公共节点之间的第二晶体管。 开关驱动器响应于输入数据信号产生第一和第二驱动信号，以互补地驱动第一和第二晶体管。 维持第一和第二驱动信号中的至少一个的电压电平，以使得第一和第二晶体管中的至少一个在饱和区域中工作，而与第一或第二输出中的至少一个的电压变化无关 当第一和第二晶体管中的至少一个被接通时的节点。 由于第一和第二晶体管在饱和区域中工作，器件的输出阻抗得到了增强。

公开(公告)号：US20130169870A1

公开(公告)日：2013-07-04

申请号：US13713051

申请日：2012-12-13

申请人： Ki Ho Lee ,  Hyung Woan Koo ,  Sang Ho Kim ,  Ho Jin Park

发明人： Ki Ho Lee ,  Hyung Woan Koo ,  Sang Ho Kim ,  Ho Jin Park

IPC分类号： H04N5/06

CPC分类号： H04N5/06 ,  H04N5/4401 ,  H04N5/46 ,  H04N21/4305

摘要： The front-end integrated circuit includes a first clock unit receiving a reference clock signal from an oscillator and generating a first clock signal, a first analog front end module receiving and processing a first broadcast signal using the first clock signal, a second clock unit receiving the reference clock signal and generating a second clock signal, and a second analog front end module receiving and processing a second broadcast signal using the second clock signal.

摘要翻译： 前端集成电路包括：第一时钟单元，接收来自振荡器的参考时钟信号并产生第一时钟信号，第一模拟前端模块使用第一时钟信号接收和处理第一广播信号;第二时钟单元接收 参考时钟信号并产生第二时钟信号，以及第二模拟前端模块，使用第二时钟信号接收和处理第二广播信号。

公开(公告)号：US07064695B2

公开(公告)日：2006-06-20

申请号：US11008532

申请日：2004-12-09

申请人： Hyung-Woan Koo

发明人： Hyung-Woan Koo

IPC分类号： H03M1/00

CPC分类号： H03K17/04106 ,  H03M1/685 ,  H03M1/687 ,  H03M1/745 ,  H03M1/747

摘要： A differential switching circuit has a first transistor connected between a first output node and a common node and a second transistor connected between a second output node and the common node. A switching driver generates first and second driving signals in response to an input data signal so as to complementarily drive the first and second transistors. A voltage level of at least one of the first and second driving signals is maintained so as to cause at least one of the first and second transistors to operate in a saturation region regardless of a voltage variation of at least one of the first or second output nodes when the at least one of the first and second transistors is turned on. Output impedance of the device is enhanced because the first and second transistors operate in the saturation region.

公开(公告)号：US09628671B2

公开(公告)日：2017-04-18

申请号：US13713051

申请日：2012-12-13

申请人： Ki Ho Lee ,  Hyung Woan Koo ,  Sang Ho Kim ,  Ho Jin Park

发明人： Ki Ho Lee ,  Hyung Woan Koo ,  Sang Ho Kim ,  Ho Jin Park

IPC分类号： H03L7/00 ,  H04N5/06 ,  H04N5/44 ,  H04N5/46 ,  H04N21/43

CPC分类号： H04N5/06 ,  H04N5/4401 ,  H04N5/46 ,  H04N21/4305

摘要： The front-end integrated circuit includes a first clock unit receiving a reference clock signal from an oscillator and generating a first clock signal, a first analog front end module receiving and processing a first broadcast signal using the first clock signal, a second clock unit receiving the reference clock signal and generating a second clock signal, and a second analog front end module receiving and processing a second broadcast signal using the second clock signal.