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    • 71. 发明授权
    • Suppressing ringing in high speed CMOS output buffers driving transmission line load
    • 抑制高速CMOS输出缓冲器中的振铃驱动传输线负载
    • US07768311B2
    • 2010-08-03
    • US11897520
    • 2007-08-30
    • Amit Kumar RathiAnkit SrivastavaParas Garg
    • Amit Kumar RathiAnkit SrivastavaParas Garg
    • H03K17/16H03K19/094
    • H03K17/6872H03K17/04206H03K17/0822H03K17/165
    • An output buffer circuit for improving an output during state transitions of CMOS buffers driving transmission line loads. The circuit generates variable output impedance proportional to the load transmission line impedance. The buffer includes an output stage, such as pull up/pull down drivers for receiving an input signal and generating an output signal. The pull up/pull down drivers are biased by a circuit that generates a control signal and varies its conductivity according to the control signal. The pull up/pull down drivers initially provide a relatively low impedance to reach a desired level during the initial transition period of the output and then slowly varies its impedance in response to the control signal to suppress the ringing effect. The control circuit coupled to the input node, output node and the power supply node to generate a control signal that biases the pull up/pull down driver.
    • 一种用于在驱动传输线负载的CMOS缓冲器的状态转变期间改善输出的输出缓冲器电路。 电路产生与负载传输线阻抗成比例的可变输出阻抗。 缓冲器包括输出级,例如用于接收输入信号并产生输出信号的上拉/下拉驱动器。 上拉/下拉驱动器由产生控制信号的电路偏置,并根据控制信号改变其电导率。 上拉/下拉驱动器最初提供相对较低的阻抗以在输出的初始过渡期间达到期望的电平,然后响应于控制信号缓慢地改变其阻抗以抑制振铃效应。 控制电路耦合到输入节点,输出节点和电源节点,以产生偏置上拉/下拉驱动器的控制信号。
    • 73. 发明授权
    • Leakage current cancellation for integrated analog switch
    • 集成模拟开关的泄漏电流消除
    • US07728649B1
    • 2010-06-01
    • US12261087
    • 2008-10-30
    • Robert W. WebbGregg D. Croft
    • Robert W. WebbGregg D. Croft
    • H03K3/01
    • H03K17/165H03K2217/0036
    • An integrated analog switch including first and second semiconductor devices and a current mirror. The first device is a switching device having first and second current terminals coupled between first and second switch terminals. When turned off, the body of the first device is pulled to a bias voltage, and a first leakage current flows between its body and the first switch terminal. The second device is a reduced-size replica of the first device having one current terminal coupled to the first switch terminal and having its body pulled to about the bias voltage when turned off. The second device provides a second leakage current which is proportional to the leakage current of the first device. The current mirror circuit mirrors and amplifies the second leakage current to provide a cancellation current which is applied to the first switch terminal to cancel leakage current.
    • 包括第一和第二半导体器件和电流镜的集成模拟开关。 第一装置是具有耦合在第一和第二开关端子之间的第一和第二电流端子的开关装置。 当关闭时,第一装置的主体被拉到偏置电压,并且第一泄漏电流在其主体和第一开关端子之间流动。 第二装置是第一装置的缩小尺寸的复本,其具有耦合到第一开关端子的一个电流端子,并且在关闭时将其主体拉至约偏置电压。 第二装置提供与第一装置的泄漏电流成比例的第二泄漏电流。 电流镜电路镜像并放大第二泄漏电流,以提供施加到第一开关端子以消除泄漏电流的消除电流。
    • 76. 发明申请
    • HIGH-FREQUENCY SWITCH CIRCUIT
    • 高频开关电路
    • US20090206910A1
    • 2009-08-20
    • US12301488
    • 2007-05-22
    • Yuji TakahashiKeiichi Numata
    • Yuji TakahashiKeiichi Numata
    • H03K17/687
    • H03K17/693H03K17/165
    • A high frequency switch circuit is provided with a switch section composed of a field effect transistor having a plurality of bias circuits; and a potential generating circuit for generating a bias voltage from a control signal and supplying a bias circuit with the bias voltage. The field effect transistor serves as a path for a high frequency signal by turning on and off corresponding to the control signal. The bias circuit is provided for generating a potential difference between the drain terminal and the source terminal of the field effect transistor and for applying a bias voltage lower than the voltage of the control signal to the drain terminal and the source terminal.
    • 高频开关电路设置有由具有多个偏置电路的场效应晶体管组成的开关部分; 以及用于从控制信号产生偏置电压并向偏置电路提供偏置电压的电位产生电路。 场效应晶体管通过与控制信号相对应的导通和截止来作为高频信号的路径。 偏置电路用于产生场效应晶体管的漏极端子和源极端子之间的电位差,并将低于控制信号的电压的偏置电压施加到漏极端子和源极端子。
    • 77. 发明申请
    • Load Driving Device
    • 负载驱动装置
    • US20090153225A1
    • 2009-06-18
    • US12314491
    • 2008-12-11
    • Akihiro Nakahara
    • Akihiro Nakahara
    • H03K17/56
    • H03K19/007H03K17/063H03K17/165H03K2017/066
    • A load driving device according to an aspect of the invention may includes an output transistor connected between a power supply line and an output terminal, a load connected between the output terminal and a first ground line, a control circuit connected between a gate of the output transistor and a second ground line, the control circuit controlling turning on/off of the output transistor, and a compensation transistor that turns on when a potential of the second ground line assumes a predetermined value or higher, thereby maintaining an off state of the output transistor.
    • 根据本发明的一个方面的负载驱动装置可以包括连接在电源线和输出端之间的输出晶体管,连接在输出端和第一接地线之间的负载,连接在输出端的栅极之间的控制电路 晶体管和第二接地线,所述控制电路控制所述输出晶体管的导通/截止;以及补偿晶体管,其在所述第二接地线的电位为预定值以上时导通,从而保持所述输出的截止状态 晶体管。
    • 80. 发明授权
    • Semiconductor device
    • 半导体器件
    • US07474083B2
    • 2009-01-06
    • US11828395
    • 2007-07-26
    • Noriaki Yoshikawa
    • Noriaki Yoshikawa
    • G05F1/40
    • H02M1/38H03K17/04206H03K17/165H03K2217/0036
    • A semiconductor device having conversion units which change the reference potential of an input signal to a first or second reference potential and outputs the input signal to a first drive unit or second drive unit, change the reference potential of a first control signal output from the first drive unit to the second reference potential and outputs the first control signal to the second drive unit, and changes the reference potential of a second control signal output from the second drive unit to the first reference potential and outputs the second control signal to the first drive unit, wherein the conversion units increase currents flowing through the conversion units on the basis of a time when the input signal changes.
    • 一种具有转换单元的半导体器件,其将输入信号的参考电位改变为第一或第二参考电位,并将输入信号输出到第一驱动单元或第二驱动单元,改变从第一驱动单元或第二驱动单元输出的第一控制信号的参考电位 驱动单元到第二参考电位,并将第一控制信号输出到第二驱动单元,并且将从第二驱动单元输出的第二控制信号的参考电位改变为第一参考电位,并将第二控制信号输出到第一驱动 单元,其中转换单元基于输入信号改变的时间增加流过转换单元的电流。