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    • 1. 发明申请
    • Current cell and digital-to-analog converter using the same
    • 当前单元和数模转换器使用相同
    • US20060125670A1
    • 2006-06-15
    • US11253181
    • 2005-10-18
    • Min ChoSeung LeeChong KwonJong Kim
    • Min ChoSeung LeeChong KwonJong Kim
    • H03M1/66
    • H03M1/0863H03K17/04106H03M1/742
    • Provided are a current cell and digital-to-analog converter (DAC) using the same. The current cell includes a current source; a first transistor transmitting a current produced from the current source to a first output node based on a first signal; a second transistor transmitting a current produced from the current source to a second output node based on a second signal; a first capacitor coupled between a gate of the first transistor and the second output node; and a second capacitor coupled between a gate of the second transistor and the first output node. A current mode DAC can improve in dynamic performance by using a plurality of current cells each having the above-described configuration.
    • 提供了使用其的当前单元和数模转换器(DAC)。 当前单元包括电流源; 第一晶体管,基于第一信号将从电流源产生的电流传输到第一输出节点; 基于第二信号将从电流源产生的电流传输到第二输出节点的第二晶体管; 耦合在所述第一晶体管的栅极和所述第二输出节点之间的第一电容器; 以及耦合在所述第二晶体管的栅极和所述第一输出节点之间的第二电容器。 电流模式DAC可以通过使用具有上述配置的多个当前单元来改善动态性能。
    • 2. 发明申请
    • Multi-band LC resonance voltage-controlled oscillator with adjustable negative resistance cell
    • 具有可调负电阻单元的多频带LC谐振压控振荡器
    • US20070132522A1
    • 2007-06-14
    • US11542288
    • 2006-10-02
    • Ja LeeKwi KimChong KwonJong KimSang LeeKyoung Cho
    • Ja LeeKwi KimChong KwonJong KimSang LeeKyoung Cho
    • H03B5/08
    • H03B5/1228H03B5/1215H03B5/1243H03B5/1265H03B5/1271H03B2201/0208H03B2201/0266H03J2200/10
    • Provided is an LC resonance voltage-controlled oscillator (VCO) used for a multi-band multi-mode wireless transceiver. In order to generate a multi-band frequency, a capacitor bank and a switchable inductor are included in the LC resonance voltage-controlled oscillator. The LC resonance voltage-controlled oscillator employs an adjustable emitter-degeneration negative resistance cell in place of tail current sources in order to compensate for non-uniform oscillation amplitude caused by the capacitor bank and prevent the degradation of a phase noise due to the tail current sources. The LC resonance voltage-controlled oscillator includes an inductor providing an inductance element partially determining the frequency of an oscillation wave; a discrete capacitor bank providing a capacitance element partially determining the frequency of the oscillation wave and being discretely determined by a control bit signal; and a discrete negative resistance cell providing a negative resistance element that is discretely determined by the control bit signal, to keep the amplitude of the oscillation wave constant.
    • 提供了一种用于多频带多模无线收发器的LC谐振压控振荡器(VCO)。 为了产生多频带频率,LC谐振压控振荡器中包括电容器组和可切换电感器。 LC谐振压控振荡器代替尾电流源采用可调发射极 - 退化负电阻电池,以补偿由电容器组引起的不均匀振荡幅度,并防止由于尾电流导致的相位噪声的降低 来源。 LC谐振电压控制振荡器包括:电感器,其提供部分地确定振荡波频率的电感元件; 分立电容器组,提供部分地确定振荡波的频率并由控制位信号离散地确定的电容元件; 以及提供由控制位信号离散地确定的负电阻元件的离散负电阻单元,以保持振荡波的幅度恒定。
    • 3. 发明申请
    • Wide-band multimode frequency synthesizer and variable frequency divider
    • 宽带多模频率合成器和可变分频器
    • US20070132515A1
    • 2007-06-14
    • US11634004
    • 2006-12-05
    • Ja LeeKwi KimChong KwonJong KimSang Lee
    • Ja LeeKwi KimChong KwonJong KimSang Lee
    • H03L7/085
    • H03K23/667H03L7/0898H03L7/093H03L7/099H03L7/193
    • A wide-band multimode frequency synthesizer using a Phase Locked Loop (PLL) is provided. The multiband frequency synthesizer includes a multimode prescaler, a phase detector/a charge pump, a swallow type frequency divider, and a switching bank LC tuning voltage-controlled oscillator having wide-band and low phase noise characteristics. The multimode prescaler operates in five modes and divides a signal up to 12 GHz. The wide-band frequency synthesizer can be used in various fields such as WLAN/HYPERLAN/DSRC/UWB systems that operate in the frequency range from 2 GHz to 9 GHz. The wide-band multimode frequency synthesizer includes a frequency/phase detector for comparing a frequency and phase of a reference high-frequency signal with a frequency and phase of a feedback high-frequency signal; a charge pump for producing an output current corresponding to the result of the comparison performed by the frequency/phase detector; a loop filter for producing an output voltage corresponding to an accumulated value of the output current of the charge pump; a voltage-controlled oscillator for generating an oscillation signal having a frequency corresponding to the output voltage of the loop filter; and a variable frequency divider for dividing an output signal of the voltage-controlled oscillator by a designated integer value, and outputting the result as a feedback signal, wherein at lease two of an amount of unit pumping charges of the charge pump, an RLC value of the loop filter, an RLC value of the voltage-controlled oscillator, and a divisor value of the variable frequency divider are controlled according to a band.
    • 提供了使用锁相环(PLL)的宽带多模频率合成器。 多频率频率合成器包括多模预分频器,相位检测器/电荷泵,燕子式分频器和具有宽带和低相位噪声特性的开关组LC调谐压控振荡器。 多模预分频器以五种模式工作,并将信号分为12 GHz。 宽带频率合成器可用于各种领域,例如在2 GHz至9 GHz频率范围内工作的WLAN / HYPERLAN / DSRC / UWB系统。 宽带多模频率合成器包括用于将参考高频信号的频率和相位与反馈高频信号的频率和相位进行比较的频率/相位检测器; 用于产生与由频率/相位检测器执行的比较结果相对应的输出电流的电荷泵; 环路滤波器,用于产生与电荷泵的输出电流的累积值相对应的输出电压; 用于产生具有与环路滤波器的输出电压对应的频率的振荡信号的压控振荡器; 以及可变分频器,用于将压控振荡器的输出信号除以指定的整数值,并输出该结果作为反馈信号,其中至少两个电荷泵的单位泵送电荷,RLC值 根据频带控制环路滤波器的电压控制振荡器的RLC值和可变分频器的除数值。
    • 6. 发明申请
    • Electrostatic discharge protection circuit using zener triggered silicon controlled rectifier
    • 使用齐纳触发的可控硅整流器的静电放电保护电路
    • US20060125054A1
    • 2006-06-15
    • US11302596
    • 2005-12-13
    • Kwi KimChong KwonJong Kim
    • Kwi KimChong KwonJong Kim
    • H01L29/167
    • H01L27/0262H01L29/87
    • Provided is an electrostatic discharge (ESD) protection circuit using a silicon controlled rectifier (SCR), which is applied to a semiconductor integrated circuit (IC). The ESD protection circuit using an SCR includes: a semiconductor substrate including a first well and a second well; first and second heavily doped regions disposed in an upper portion of the first well; third and fourth heavily doped regions disposed in an upper portion of the second well; a fifth heavily doped region disposed at an interface between the first and second wells; a sixth heavily doped region disposed beside the fifth heavily doped region in the upper portion of the second well; a first overload preventing unit having a drain connected to the sixth heavily doped region, a source connected to the first and second heavily doped regions, and a gate connected to the first and second heavily doped regions through a first resistor; and a second overload preventing unit having a drain connected to the fifth heavily doped region, a source connected to the third and fourth heavily doped regions, and a gate connected to the third and fourth heavily doped regions through a second resistor.
    • 提供了一种应用于半导体集成电路(IC)的使用可控硅整流器(SCR)的静电放电(ESD)保护电路。 使用SCR的ESD保护电路包括:包括第一阱和第二阱的半导体衬底; 第一和第二重掺杂区域设置在第一阱的上部; 第三和第四重掺杂区域设置在第二阱的上部; 设置在第一和第二阱之间的界面处的第五重掺杂区域; 第六重掺杂区域,设置在第二阱的上部的第五重掺杂区域旁边; 第一过载防止单元,其具有连接到第六重掺杂区域的漏极,连接到第一和第二重掺杂区域的源极以及通过第一电阻器连接到第一和第二重掺杂区域的栅极; 以及第二过载防止单元,其具有连接到第五重掺杂区域的漏极,连接到第三和第四重掺杂区域的源极,以及通过第二电阻器连接到第三和第四重掺杂区域的栅极。
    • 8. 发明申请
    • Multi-domain liquid crystal display device
    • 多域液晶显示装置
    • US20050105030A1
    • 2005-05-19
    • US10938854
    • 2004-09-13
    • Jeom KimDoo KoJoun LeeJong KimJong KimYoung ChoMi Chu
    • Jeom KimDoo KoJoun LeeJong KimJong KimYoung ChoMi Chu
    • G02F1/1362G02F1/1337
    • G02F1/136213G02F1/136286G02F2001/136218
    • A multi-domain liquid crystal display device comprises first and second substrates facing each other; a liquid crystal layer between the first and second substrates; a plurality of gate bus lines arranged in a first direction on the first substrate and a plurality of data bus lines arranged in a second direction on the first substrate to define a plurality of pixel region; a thin film transistor positioned at a crossing area of the data bus line and the gate bus line, the thin film transistor comprising a gate electrode, a semiconductor layer, and source/drain electrodes; a common-auxiliary electrode comprising at least one electrode in the each pixel region; a plurality of pixel electrodes electrically charged through the thin film transistor; and an alignment layer on at least one substrate between the first and second substrates.
    • 多域液晶显示装置包括彼此面对的第一和第二基板; 第一和第二基板之间的液晶层; 在第一基板上沿第一方向排列的多个栅极总线和在第一基板上沿第二方向布置的多个数据总线,以限定多个像素区域; 位于数据总线和栅极总线的交叉区域的薄膜晶体管,薄膜晶体管包括栅极,半导体层和源极/漏极; 在每个像素区域中包括至少一个电极的公共辅助电极; 通过薄膜晶体管充电的多个像素电极; 以及在所述第一和第二基板之间的至少一个基板上的取向层。