Active filter circuit

Details Active filter circuit Active filter circuit

1986-03-27

1987-08-25

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including frequency-responsive means in the signal...

330257, H03F 304, H03F 345

Patent

active

046895809

ABSTRACT:
An active filter circuit having emitter coupled first and second transmittors and emitter coupled third and fourth transistors, wherein the base and collector electrodes of the third transistor are connected to the base electrode of the first transistor, and the base and collector electrodes of the fourth transistor are connected to the base electrode of the second transistor with a reactance circuit connected to a collector electrode of the second transistor and an output terminal connected by the collector electrode of the second transistor such that the filter circuit has a small number of components and operates over a broad band.

REFERENCES:
patent: 4292584 (1981-09-01), Kusakabe

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