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    • 2. 发明授权
    • Variable resistor, filter, variable gain amplifier and integrated circuit using the variable resistor
    • 可变电阻,滤波器,可变增益放大器和使用可变电阻的集成电路
    • US07750716B2
    • 2010-07-06
    • US12187074
    • 2008-08-06
    • Masahiro Hosoya
    • Masahiro Hosoya
    • H03L5/00
    • H03H7/24H03H11/1291
    • A variable resistor formed on a silicon substrate, and changing a resistance value between an input terminal and an output terminal, includes a plurality of first resistors each having one end connected in common to the input terminal, and each having other end, a plurality of second resistors each having a resistance value smaller than the first resistors, and each having one end connected to the other end of any one of the first resistors, and a switch group interposed between the input terminal and the output terminal, and selecting one from the first resistors, and further, selecting at least one from the second resistors connected to the other end of the selected first resistor.
    • 形成在硅衬底上并且改变输入端子和输出端子之间的电阻值的可变电阻器包括多个第一电阻器,每个第一电阻器的一端共同连接到输入端子,并且每个具有另一端,多个 第二电阻器,其电阻值小于第一电阻器,并且每个电阻器的一端连接到第一电阻器中的任一个的另一端,以及插入在输入端子和输出端子之间的开关组, 第一电阻器,并且还从连接到所选择的第一电阻器的另一端的第二电阻器中选择至少一个。
    • 3. 发明申请
    • FILTER CIRCUIT, RECEIVER USING THE SAME, AND FILTERING METHOD USING THE SAME
    • 过滤器电路,使用它的接收器和使用其的滤波方法
    • US20090219186A1
    • 2009-09-03
    • US12366712
    • 2009-02-06
    • Hiroaki IshiharaMasahiro HosoyaHidenori Okuni
    • Hiroaki IshiharaMasahiro HosoyaHidenori Okuni
    • H03M1/12
    • H04B1/12
    • According to an aspect of the present invention, there is provided a filter circuit including: an ADC that converts a first analog signal into a first digital signal; a digital filter that extracts an interference component from the first digital signal and generates a second digital signal; a DAC that converts the second digital signal into a second analog signal; a delayer that delays the first analog signal based on a delay caused in the second analog signal and generates a delayed first analog signal; a subtractor that subtracts the second analog signal from the delayed first analog signal and generates an output signal; and a controller that controls the digital filter based on a remaining interference component that is remaining in the output signal.
    • 根据本发明的一个方面,提供了一种滤波电路,包括:将第一模拟信号转换为第一数字信号的ADC; 数字滤波器,从所述第一数字信号中提取干扰分量并产生第二数字信号; DAC,其将所述第二数字信号转换为第二模拟信号; 延迟器,其基于在所述第二模拟信号中引起的延迟来延迟所述第一模拟信号,并产生延迟的第一模拟信号; 减法器,从延迟的第一模拟信号中减去第二模拟信号并产生输出信号; 以及控制器,其基于剩余在所述输出信号中的剩余干扰分量来控制所述数字滤波器。