Polar leapfrog filter

Details Polar leapfrog filter Polar leapfrog filter

1992-03-26

1994-03-22

Callahan, Timothy R.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328167, 330107, H03F 304

Patent

active

052967638

ABSTRACT:
A polar leapfrog filter includes at least one polar network. The polar network comprises a differentiator constituted by an operational amplifier having input and output terminals, and a first integrator formed by a first capacitor for providing negative feedback to the operational amplifier and a first variable transconductance amplifier; and a second integrator formed by a second capacitor for providing negative feedback to the first integrator, and a second variable transconductance amplifier. In the case where two or more said polar networks are incorporated, an integrator is provided between adjacent ones of the polar networks. The total number of all the circuits is selected to be odd and equal to the order of the filter. The adjacent ones of the circuits are connected in such a manner that leapfrog type negative feedback is effected.

REFERENCES:
patent: 3986127 (1976-10-01), Ray
patent: 5177382 (1993-01-01), Kondo et al.
patent: 5182522 (1993-01-01), Tanigawa et al.
patent: 5216375 (1993-06-01), Tanigawa et al.

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