Audio frequency amplifier

Details Audio frequency amplifier Audio frequency amplifier

1978-04-27

1979-02-13

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330109, 330294, 330304, H03F 3183

Patent

active

041398254

ABSTRACT:
An equalizer amplifier of a negative feedback type comprises a common-emitter amplifier, an emitter follower amplifier cascade-connected thereto, and a negative feedback network connected between the output terminal of the emitter follower amplifier and the input terminal of the common-emitter amplifier with its negative feedback level increased as the frequency increases, wherein an inductance element is connected in series with the negative feedback circuit to attenuate harmful signals whose frequencies are higher than those of audio signals, thereby making large the ratio of signal to noise in the equalizer amplifier.

REFERENCES:
patent: 4032855 (1977-06-01), Holman

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