公开(公告)号：US08442470B1

公开(公告)日：2013-05-14

申请号：US12778236

申请日：2010-05-12

申请人： Cao-Thong Tu ,  David Cousinard ,  Frederic Declercq

发明人： Cao-Thong Tu ,  David Cousinard ,  Frederic Declercq

IPC分类号： H04B15/00

CPC分类号： H04B1/525

摘要： A system includes a weighting module, a mixer module, and a frequency selective impedance (FSI). The weighting module is configured to receive an input signal having an amplitude and to generate weighted outputs. Amplitudes of the weighted outputs have ratios relative to the amplitude of the input signal. The mixer module has switches configured to receive the weighted outputs and to generate a staircase waveform when the switches are clocked by clock signals. Amplitudes of steps of the staircase waveform are based on the ratios. The FSI is configured to communicate with the switches. The switches are configured to translate an impedance of the FSI centered on a first frequency to a second frequency determined by a frequency of the clock signals.

摘要翻译： 系统包括加权模块，混频器模块和频率选择阻抗（FSI）。 加权模块被配置为接收具有幅度的输入信号并产生加权输出。 加权输出的幅度相对于输入信号的幅度具有比例。 混频器模块具有被配置为接收加权输出并且当开关由时钟信号计时时产生阶梯波形的开关。 阶梯波形的幅度基于比率。 FSI配置为与交换机进行通信。 开关被配置为将以第一频率为中心的FSI的阻抗转换为由时钟信号的频率确定的第二频率。

公开(公告)号：US07984093B1

公开(公告)日：2011-07-19

申请号：US11729114

申请日：2007-03-28

申请人： Cao-Thong Tu ,  Frederic Declercq

发明人： Cao-Thong Tu ,  Frederic Declercq

IPC分类号： G06G7/02

CPC分类号： H03H11/20 ,  H03H2011/0488 ,  H03H2011/0494

摘要： A polyphase filter comprises an impedance network. The polyphase filter also comprises a first differential amplifier that includes first inverting and non-inverting inputs and first inverting and non-inverting outputs. The first inverting and non-inverting inputs communicate through the impedance network with a first phase and a shifted first phase of an input signal, respectively. A second differential amplifier of the polyphase filter includes second inverting and non-inverting inputs and second inverting and non-inverting outputs. The second inverting and non-inverting inputs communicate with a second phase and a shifted second phase of the input signal, respectively, through the impedance network. The second phase is offset from the first phase.

摘要翻译： 多相滤波器包括阻抗网络。 多相滤波器还包括第一差分放大器，其包括第一反相和非反相输入以及第一反相和非反相输出。 第一反相和非反相输入分别通过阻抗网络与输入信号的第一相位和移位的第一相位通信。 多相滤波器的第二差分放大器包括第二反相和非反相输入以及第二反相和非反相输出。 第二反相和非反相输入通过阻抗网络分别与输入信号的第二相位和移位的第二相位通信。 第二阶段偏离第一阶段。