Multiple-feedback path filter

Details Multiple-feedback path filter Multiple-feedback path filter

1980-11-12

1983-05-03

Mullins, James B.

Amplifiers

Signal feedback

Phase shift means in loop path

330109, 330126, H03F 134

Patent

active

043822339

ABSTRACT:
A multiple-feedback path bandpass/bandreject filter which exhibits a nearly constant Q over a predetermined frequency range, and which is tunable by means of a single variable impedance element is provided. A Thevenin equivalent voltage source is placed in series with the tuning element, wherein the Thevenin voltage is a predetermined constant fractional amplitude of the bandreject output voltage, or its equivalent.

REFERENCES:
patent: 3743957 (1973-07-01), Feistel

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