专利名称：Discrete inductor bank and LC filter发明人：Takatsugu Kamata,Kazunori Okui申请号：US11246475申请日：20051007公开号：US07183880B2公开日：20070227
专利附图：
摘要：A discrete inductive-capacitive (LC) filter selects between at least two inductorbanks to tune the LC filter. The filter receives an input signal that includes one or morebands of frequencies. A control signal selects a band of frequencies for processing. A firstinductor bank is selected to filter a first band of frequencies, and a second inductor bank
is selected to filter a second band of frequencies. A switch circuit couples the input signalto either the first inductor bank or the second inductor bank. The switch circuit selectsthe first inductor bank if the first band of frequencies is selected, and selects the secondinductor bank if the second band of frequencies is selected. The switch circuit electricallyisolates the switching of the input signal to the first and the second inductor banks, so asto enhance the Q factor of the LC filter. Circuit and techniques are disclosed to reduceparasitic capacitance in a capacitive bank that employs MOS transistors. Furthermore,circuits and techniques are disclosed to tune a coupling factor on an inductive bank basedon the frequency of the input signal.
申请人：Takatsugu Kamata,Kazunori Okui
地址：Yokohama JP,San Jose CA US
国籍：JP,US
代理机构：Stattler Johansen & Adeli LLP
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