Impedance compensation circuit in a speaker driving system

Details Impedance compensation circuit in a speaker driving system Impedance compensation circuit in a speaker driving system

1989-04-28

1990-11-06

Isen, Forester W.

Electrical audio signal processing systems and devices

Loudspeaker feedback

381 59, H04R 300

Patent

active

049691953

ABSTRACT:
In an impedance compensation circuit of a speaker driving system, an ideal impedance state of the speaker can be equivalently formed by the equivalent impedance means, and is compared with an impedance state of an actual speaker. On the basis of the comparison result, a positive feedback gain in the speaker driving means is controlled. Therefore, even when the internal impedance of the speaker or the impedance of the connecting cable varies, or when the internal impedance of the speaker is changed upon a change in temperature, the motional impedance of the speaker can always be driven and damped with a constant driving impedance. For this reason, in the negative-impedance driving system, an ideal speaker control state can always be realized.

REFERENCES:
patent: 3647969 (1972-03-01), Korn
patent: 3889060 (1975-06-01), Goto et al.
patent: 4797933 (1989-01-01), Hahne

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