SD-ADC with digital dither signal processing
    1.
    发明授权
    SD-ADC with digital dither signal processing 有权
    具有数字抖动信号处理的SD-ADC

    公开(公告)号:US06738002B2

    公开(公告)日:2004-05-18

    申请号:US10229936

    申请日:2002-08-28

    IPC分类号: H03M120

    CPC分类号: H03M3/33 H03M3/424 H03M3/43

    摘要: A sigma-delta analog-to-digital converter includes an integrator and a dither signal generator for generating a digital dither signal, and a plurality of comparators for converting an analog signal received from the integrator into an output digital value. A digital logic unit is in data communication with the digital dither signal and the comparators. The digital logic unit is configured to change the output digital value on the basis of the digital dither signal.

    摘要翻译: Σ-Δ模数转换器包括用于产生数字抖动信号的积分器和抖动信号发生器,以及用于将从积分器接收的模拟信号转换为输出数字值的多个比较器。 数字逻辑单元与数字抖动信号和比较器进行数据通信。 数字逻辑单元被配置为基于数字抖动信号来改变输出数字值。

    Multistage differential amplifier with CMFB circuit
    2.
    发明授权
    Multistage differential amplifier with CMFB circuit 有权
    具有CMFB电路的多级差分放大器

    公开(公告)号:US06888407B2

    公开(公告)日:2005-05-03

    申请号:US10233068

    申请日:2002-08-31

    IPC分类号: H03F3/45

    摘要: The invention relates to a multistage differential amplifier having an input stage, at which a differential input voltage is present, a load connected to the input stage, a CMFB circuit and an output stage, at which an amplified differential output voltage is output. In order to improve the stability of a common-mode regulating loop, a current source is provided, which additionally feeds current into the regulating loop and thereby ensures that a control voltage for the load does not fall below a predetermined value.

    摘要翻译: 本发明涉及一种具有输入级的多级差分放大器,存在差分输入电压,连接到输入级的负载,输出级放大的差分输出电压的CMFB电路和输出级。 为了提高共模调节回路的稳定性,提供了电流源,其另外将电流馈送到调节回路中,从而确保负载的控制电压不降至预定值以下。

    Analogue echo filter
    3.
    发明授权
    Analogue echo filter 有权
    模拟回波滤波器

    公开(公告)号:US06947478B1

    公开(公告)日:2005-09-20

    申请号:US09890751

    申请日:2000-02-04

    CPC分类号: H04B3/23

    摘要: The invention relates to an analog echo filter for a modem, to which an analog transmit signal is supplied. According to the invention, a passive analog input filter and an active analog filter, whose transfer function is adjustable, are provided. The transfer function of the active analog filter can preferably be switched between a first-order transfer function and a second-order transfer function.

    摘要翻译: 本发明涉及一种用于调制解调器的模拟回波滤波器,向其提供模拟发射信号。 根据本发明,提供了一种无功模拟输入滤波器和一个可调节传递函数的有源模拟滤波器。 有源模拟滤波器的传递函数可以优选地在一阶传递函数和二阶传递函数之间切换。