Up-conversion mixer having a reduced third order harmonic
    3.
    发明授权
    Up-conversion mixer having a reduced third order harmonic 有权
    具有降低的三阶谐波的上变频混频器

    公开(公告)号:US08593206B2

    公开(公告)日:2013-11-26

    申请号:US13084885

    申请日:2011-04-12

    IPC分类号: G06F7/44

    摘要: According to some embodiments, an up-conversion mixer includes a mixer cell having an output node arranged to provide an output. An input stage is coupled to the mixer cell and arranged to receive an input signal. The mixer cell is configured to generate the output with an up-converted frequency compared to an input frequency of the input signal. The input stage is configured to reduce a third order harmonic term of the output so that an output power plot of the third order harmonic term with respect to an input power has a notch with a local minimum.

    摘要翻译: 根据一些实施例,上变频混频器包括具有布置成提供输出的输出节点的混频器单元。 输入级耦合到混频器单元并被布置成接收输入信号。 混频器单元被配置为与输入信号的输入频率相比产生具有上转换频率的输出。 输入级被配置为减少输出的三阶谐波项,使得相对于输入功率的三阶谐波项的输出功率图具有局部最小值的陷波。

    In-Situ RC-Calibration Scheme for Active RC Filter
    4.
    发明申请
    In-Situ RC-Calibration Scheme for Active RC Filter 有权
    有源RC滤波器的现场RC校准方案

    公开(公告)号:US20120095715A1

    公开(公告)日:2012-04-19

    申请号:US12907586

    申请日:2010-10-19

    IPC分类号: G06F19/00

    摘要: A method of calibrating a filter includes applying an input signal into the filter to generate an output signal, measuring a phase difference between the input signal and the output signal; determining a leading/lagging status of the phase difference; calculating a capacitor code (CAP_CODE) using the leading/lagging status; and calibrating the capacitor using the CAP_CODE.

    摘要翻译: 校准滤波器的方法包括将输入信号施加到滤波器中以产生输出信号,测量输入信号和输出信号之间的相位差; 确定相位差的前导/滞后状态; 使用前导/滞后状态计算电容代码(CAP_CODE); 并使用CAP_CODE校准电容器。

    Low supply voltage band-gap reference circuit and negative temperature coefficient current generation unit thereof and method for supplying band-gap reference current
    5.
    发明申请
    Low supply voltage band-gap reference circuit and negative temperature coefficient current generation unit thereof and method for supplying band-gap reference current 失效
    低电压带隙参考电路及其负温度系数电流产生单元及其提供带隙参考电流的方法

    公开(公告)号:US20080018319A1

    公开(公告)日:2008-01-24

    申请号:US11489096

    申请日:2006-07-18

    IPC分类号: G05F3/16

    CPC分类号: G05F3/30

    摘要: A low supply voltage band-gap reference circuit is provided, which includes a positive temperature coefficient current generation unit and a negative temperature coefficient current generation unit, and it is implemented by way of current summing. Through the current-mode temperature compensation technique, the present invention is able to reduce the voltage headroom and the number of operational amplifiers required by the conventional voltage-summing method, as well as the influence to the output voltage due to the offset voltage, thereby providing a stable and low voltage band-gap reference voltage level. In addition, by reducing the number of operational amplifiers and resistors of high resistance, the circuit area is reduced, and chip cost is saved.

    摘要翻译: 提供一种低电压带隙参考电路,其包括正温度系数电流产生单元和负温度系数电流产生单元,并且其通过电流求和来实现。 通过电流模式温度补偿技术,本发明能够减小常规电压求和方法所需的电压余量和运算放大器的数量,以及由于偏移电压对输出电压的影响,从而 提供稳定和低电压带隙参考电压电平。 另外,通过减少高电阻的运算放大器和电阻器的数量,减少了电路面积,节省了芯片成本。

    Low supply voltage band-gap reference circuit and negative temperature coefficient current generation unit thereof and method for supplying band-gap reference current
    6.
    发明授权
    Low supply voltage band-gap reference circuit and negative temperature coefficient current generation unit thereof and method for supplying band-gap reference current 失效
    低电压带隙参考电路及其负温度系数电流产生单元及其提供带隙参考电流的方法

    公开(公告)号:US07495505B2

    公开(公告)日:2009-02-24

    申请号:US11489096

    申请日:2006-07-18

    CPC分类号: G05F3/30

    摘要: A low supply voltage band-gap reference circuit is provided, which includes a positive temperature coefficient current generation unit and a negative temperature coefficient current generation unit, and it is implemented by way of current summing. Through the current-mode temperature compensation technique, the present invention is able to reduce the voltage headroom and the number of operational amplifiers required by the conventional voltage-summing method, as well as the influence to the output voltage due to the offset voltage, thereby providing a stable and low voltage band-gap reference voltage level. In addition, by reducing the number of operational amplifiers and resistors of high resistance, the circuit area is reduced, and chip cost is saved.

    摘要翻译: 提供一种低电压带隙参考电路,其包括正温度系数电流产生单元和负温度系数电流产生单元,并且其通过电流求和来实现。 通过电流模式温度补偿技术,本发明能够减小常规电压求和方法所需的电压余量和运算放大器的数量,以及由于偏移电压对输出电压的影响,从而 提供稳定和低电压带隙参考电压电平。 另外,通过减少高电阻的运算放大器和电阻器的数量,减少了电路面积,节省了芯片成本。

    In-situ RC-calibration scheme for active RC filter
    8.
    发明授权
    In-situ RC-calibration scheme for active RC filter 有权
    有源RC滤波器的原位RC校准方案

    公开(公告)号:US08626469B2

    公开(公告)日:2014-01-07

    申请号:US12907586

    申请日:2010-10-19

    IPC分类号: H03B1/00 H03K5/00

    摘要: A method of calibrating a filter includes applying an input signal into the filter to generate an output signal, measuring a phase difference between the input signal and the output signal; determining a leading/lagging status of the phase difference; calculating a capacitor code (CAP_CODE) using the leading/lagging status; and calibrating the capacitor using the CAP_CODE.

    摘要翻译: 校准滤波器的方法包括将输入信号施加到滤波器中以产生输出信号,测量输入信号和输出信号之间的相位差; 确定相位差的前导/滞后状态; 使用前导/滞后状态计算电容代码(CAP_CODE); 并使用CAP_CODE校准电容器。

    Voltage reference circuit
    10.
    发明授权
    Voltage reference circuit 失效
    电压参考电路

    公开(公告)号:US07301321B1

    公开(公告)日:2007-11-27

    申请号:US11470499

    申请日:2006-09-06

    IPC分类号: G05F3/16

    摘要: A voltage reference circuit including a positive temperature coefficient current generator, a negative temperature coefficient current generator, and a first resistor is provided. In the positive temperature coefficient current generator, two transistors are operated in the weak inversion region, and a second resistor is connected in series between the gates of the two transistors. The second resistor employs the characteristic that a transistor operated in weak inversion region acts like a bipolar junction transistor to generate a positive temperature coefficient current. The negative temperature coefficient current generator generates a negative temperature coefficient current in response to a negative temperature coefficient voltage drop on a third resistor. The positive temperature coefficient current and the negative temperature coefficient current flow through the first resistor together, thus producing a stable reference voltage.

    摘要翻译: 提供了包括正温度系数电流发生器,负温度系数电流发生器和第一电阻器的电压参​​考电路。 在正温度系数电流发生器中,两个晶体管在弱反转区域中工作,第二电阻串联连接在两个晶体管的栅极之间。 第二电阻器采用在弱反转区域中工作的晶体管的作用就像双极结型晶体管一样产生正温度系数电流的特性。 负温度系数电流发生器响应于第三电阻器上的负温度系数电压降产生负温度系数电流。 正温度系数电流和负温度系数电流一起流过第一个电阻,从而产生稳定的参考电压。