RC-Active filters

Details RC-Active filters RC-Active filters

1983-06-27

1985-11-12

Mullins, James B.

Amplifiers

Signal feedback

Phase shift means in loop path

330109, 330126, 307520, 328167, H03F 134

Patent

active

045531030

ABSTRACT:
Second and third-order RC active filter sections are described both based on a similar basic twin-tee network. The circuits include a single operational amplifier and are such that the poles and zeros of the network can be adjusted with little interaction by varying resistances in sequence. It is possible to construct the sections using capacitors of wide tolerance.

REFERENCES:
IEEE Transactions on Circuit Theory, vol. CT-19, No. 4, Jul. 1972, pp. 398-403, New York, US, T. A. Hamilton et al.: "A Single-Amplifier Biquad Active Filter", Figures 1a, 1b; p. 398, II The General Configuration--p. 403, line 5.
IEEE Transactions on Circuits and Systems, vol. CAS-22, No. 4, Apr. 1975, pp. 329-333, New York, US, A. Boctor: "Design of a Third-Order Single Amplifier Filter".
Fujii, "Predistorted RC Active Filters with Low Pole Sensitivity to Finite GB of Single Pole Operational Amplifier", The Transactions of the IECE of Japan, vol. E63, No. 10, Oct. 1980, pp. 715-722.

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