Passive equalizer with negative impedance to increase a gain
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United States of America Patent
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Jun 15, 2010
Grant Date -
Dec 3, 2009
app pub date -
Aug 15, 2008
filing date -
May 29, 2008
priority date (Note) -
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Abstract
A passive equalizer with negative impedance to increase a gain includes a first RC loop, a second RC loop, a cascade RL circuit and a cross-coupled inverter unit. Each of the first and the second RC loops includes a first resistor, a second resistor connected in series to the first resistor at a node to thereby form a resistor series, and a capacitor connected in parallel to the resistor series. The cascade RL circuit is connected between the RC loops and includes a fifth resistor, a sixth resistor and an inductor connected between the fifth resistor and the sixth resistor. The cross-coupled inverter unit is connected in parallel to the RL circuit and connected between the RC loops for using the feature of negative impedance to obtain an excellent high-frequency gain.
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