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Digitally driven combination coils for electrodynamic acoustic transducers

  • US 4,360,707 A
  • Filed: 11/24/1980
  • Issued: 11/23/1982
  • Est. Priority Date: 11/24/1980
  • Status: Expired due to Term
First Claim
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1. In combination with an acoustical transducer having at least two independently addressable coils, a modulator and amplifier comprising means for converting an analog input signal to pulse width modulated signals and amplified output means for addressing the signals to respective ones of said coils.

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