Audio frequency amplifiers

Details Audio frequency amplifiers Audio frequency amplifiers

H - Electricity

03

F

330/30

H03F 3/183 (2006.01) G11B 23/00 (2006.01)

Patent

CA 1086385

AUDIO FREQUENCY AMPLIFIER ABSTRACT OF THE DISCLOSURE 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.

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