Active equalizer

Details Active equalizer Active equalizer

H - Electricity

03

H

333/28

H03H 11/12 (2006.01) H03G 5/04 (2006.01) H03H 11/00 (2006.01) H04B 3/14 (2006.01)

Patent

CA 1171146

38/SO1545 ACTIVE EQUALIZER ABSTRACT OF THE DISCLOSURE In an active equalizer for selectively boosting or attenuating predetermined frequencies of audio or other electrical signals, and which comprises an inverting ampli- fier having an inverting input which receives the input signal through an input resistance and an output connected with the inverting input through a feedback resistance and at which the equalized output is derived, and an active filter for determining the frequencies to be boosted or attenuated; there is further provided a change-over switch having a boosting position in which the input signal is applied to the active filter, an attenuating position in which the output of the inverting filter is applied to the active filter and a neutral position, and a potentiometer connected between the output of the active filter and the inverting input of the inverting amplifier and being operable in concert with the change-over switch for deter- mining the extent to which the frequencies determined by the active filter are boosted or attenuated.

396629

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