Frequency characteristic adjusting apparatus

Details Frequency characteristic adjusting apparatus Frequency characteristic adjusting apparatus

1981-09-11

1984-06-19

Mullins, James B.

Amplifiers

With plural amplifier channels

Amplifying different frequencies in different channels

330278, 330 84, H03F 368, H03G 330

Patent

active

044555350

ABSTRACT:
Frequency characteristic adjusting apparatus used in sound apparatus or the like, in which an input signal is divided into first and second frequency bands after being amplified, the gain of the signal of the first frequency band controlled by first and second gain control circuits respectively, the gain of the signal of the second frequency band controlled by third and fourth gain control circuits respectively, and the output signals from the first and second gain control circuits added and negatively fed back to the amplifier. The output signals from the third and fourth gain control circuits are also added.

REFERENCES:
patent: 3667043 (1972-05-01), Ahlgren
patent: 3893038 (1975-07-01), Omata et al.

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