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Electronic converter for converting an acoustic signal into a pseudo-digital signal, timepiece including such a converter and two-directional communication method via acoustic waves

  • US 6,577,559 B1
  • Filed: 08/02/2000
  • Issued: 06/10/2003
  • Est. Priority Date: 08/04/1999
  • Status: Expired due to Fees
First Claim
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1. A sound generator circuit including a piezoelectric vibrator which generates a sound in response to an electric signal, and which also generates an electric signal in response to an acoustic wave, the generator circuit further comprising means for preventing the piezoelectric vibrator from discharging.

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