Passive equalizer with negative impedance to increase a gain

Details Passive equalizer with negative impedance to increase a gain Passive equalizer with negative impedance to increase a gain

2008-08-15

2010-06-15

Jones, Stephen E (Department: 2817)

Wave transmission lines and networks

Coupling networks

Equalizers

Reexamination Certificate

active

07737802

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.

REFERENCES:
patent: 7504906 (2009-03-01), Chu
patent: 2008/0238587 (2008-10-01), Shin et al.

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