Audio amplifying circuit

Details Audio amplifying circuit Audio amplifying circuit

1991-09-06

1993-04-06

Mottola, Steven

Amplifiers

With plural amplifier channels

Amplifying different frequencies in different channels

381 28, H03F 368

Patent

active

052007090

ABSTRACT:
An amplifying circuit of the invention comprises: a high frequency amplifying circuit for amplifying high frequency; a low frequency amplifying circuit for amplifying a low frequency; input filters which are provided on the input side of the respective amplifying circuits so as to pass the frequency components thereof; output filters having the same characteristics as those of the input filters; and an adding circuit for adding outputs of the output filters. Therefore, an output dynamic range of the whole amplifying circuit is equal to the sum of the dynamic ranges of the respective amplifying circuits, so that a large output which is not distorted even if a sound volume is raised is derived. By providing a matching filter on the input side of the low frequency amplifying circuit, even if the low frequency side output filter which needs a large coil is omitted, the frequency characteristics of the output of the adding circuit can be made flat and the amplifying circuit of a small size and a less distortion can be realized.

REFERENCES:
patent: 4052560 (1977-10-01), Santmann
patent: 4249042 (1981-02-01), Orban
patent: 4327331 (1982-04-01), Yoshimi et al.
patent: 4438414 (1984-03-01), Blachot

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