Title:
無線周波誘導容量性フィルタ回路トポロジー
Document Type and Number:
Japanese Patent JP2008533840
Kind Code:
A
Abstract:
A filter circuit topology for filtering a radio frequency input signal includes one or more inductor devices, such as, for example, discrete chip or air coils. The inductor devices are center tapped into a capacitor coupled to the ground. The center-tapped inductor configuration splits the output voltage across the inductor devices into two equal voltages of predetermined amplitude determined by the quality factor of the filter circuit. The filter circuit further includes an input capacitor to receive the RF input signal and an output capacitor coupled respectively to the inductor devices, the output capacitor having a variable capacitance, the inductor devices and the variable capacitor forming an inductive-capacitive (LC) filter capable of filtering the RF input signal and generating an output filtered signal for further transmission to a television tuner.
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Inventors:
Takatsugu Kamada
Okui Kazunori
Okui Kazunori
Application Number:
JP2008500932A
Publication Date:
August 21, 2008
Filing Date:
March 10, 2006
Export Citation:
Assignee:
Rfstream inc.
International Classes:
H03H7/42; H03H7/12; H03H7/46; H04B1/18
Attorney, Agent or Firm:
Kazunori Saito
Tetsuya Ito
Tetsuya Ito