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Transducer-based sensor system with multiple drive signal variants

  • US 7,135,806 B2
  • Filed: 10/31/2002
  • Issued: 11/14/2006
  • Est. Priority Date: 10/31/2002
  • Status: Expired due to Fees
First Claim
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1. A sensor system, comprising:

  • a plurality of transducer groups, each containing a plurality of transducers in operative proximity with a sample material,where each transducer within each transducer group is actuated by receiving a different phase-shifted variant of a local oscillator signal, andwhere the phase-shifted variants of the local oscillator signal are selectively filtered during output processing to inhibit cross-transducer interference occurring between simultaneously active transducers.

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