Electrical audio signal processing systems and devices – Including frequency control
Patent
1986-09-22
1988-07-19
Isen, Forester W.
Electrical audio signal processing systems and devices
Including frequency control
381 86, 333 28T, H03G 500
Patent
active
047590653
ABSTRACT:
A sound system comprises four channels, each having a low level input for coupling to a source of program material, multiple, independently selectable gyrators providing equalization poles, and an input stage for independently and selectively coupling one or more of the gyrators to the low level input. Each channel further includes an amplifier, a buffer for coupling the selected one or more of the multiple gyrators to the amplifier, and a transducer coupled to the amplifier. A filter is coupled between the buffer and the amplifier. The filter has a variable lower corner frequency and a control input terminal. The sound system further comprises a low-pass filter circuit coupled between the amplifier and the control input terminal of the variable corner frequency filter for generating a feedback signal.
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Field Daniel J.
Field Richard C.
Harman International Industries Incorporated
Isen Forester W.
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