Speaker apparatus

Details Speaker apparatus Speaker apparatus

1997-10-27

1999-06-01

Kuntz, Curtis A.

Electrical audio signal processing systems and devices

Circuitry combined with specific type microphone or loudspeaker

381117, 381401, H04R 300

Patent

active

059094966

ABSTRACT:
A speaker apparatus which drives an electromagnetic-coupling-type speaker in accordance with a digital signal is provided with a speaker unit, and a plurality of amplifiers corresponding to the number of quantization bits of a digital audio signal. The output terminals of the amplifiers are connected to the respective primary coils, respectively, and the output impedances of the plurality of the amplifiers are made equal to those of the respective primary coils to which the amplifiers are connected. Each bit of each sample of the digital audio signal is amplified by the plurality of the amplifiers and supplied to the respective primary coils, respectively.

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patent: 5347587 (1994-09-01), Takahashi et al.
patent: 5592559 (1997-01-01), Takahashi et al.

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