Operational amplifier compensation technique for biquadratic not

Details Operational amplifier compensation technique for biquadratic not Operational amplifier compensation technique for biquadratic not

1985-08-26

1986-06-03

Mullins, James B.

Amplifiers

Signal feedback

Phase shift means in loop path

330151, 330302, H03F 132

Patent

active

045932506

ABSTRACT:
An active biquadratic notch filter having first integrating circuitry for providing a first integration signal and further having second integrating circuitry responsive to the first integration signal for providing a filter output. The first integrating circuitry includes at least one operational amplifier. The notch filter further includes compensation circuitry for compensating the limitation on notch frequency attenuation resulting from current lag introduced by the at least one operational amplifier of the first integrating circuitry.

REFERENCES:
patent: 3868605 (1975-02-01), Poole
patent: 4080559 (1978-03-01), Wright et al.
patent: 4242642 (1980-12-01), Laker et al.
patent: 4257006 (1981-03-01), Schaumann
patent: 4315227 (1982-02-01), Fleischer et al.

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