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Electromechanical transducer-coupled mechanical structure with negative capacitance compensation circuit

  • US 4,158,787 A
  • Filed: 05/08/1978
  • Issued: 06/19/1979
  • Est. Priority Date: 05/08/1978
  • Status: Expired due to Term
First Claim
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1. In an electromechanical system including a mechanical member which is subject to vibrational movement and an electromechanical transducer mounted on said member and providing between first and second terminals an electrical signal responsive to said vibrational movement, electrical circuit means coupled between said first and second terminals for providing a negative capacitance of a value cancelling a substantial portion of the capacitance inherent in said electromechanical transducer;

  • said electrical circuit means including an operational amplifier having a non-inverting input terminal an inverting input terminal, and an output terminal;

    said non-inverting input terminal being coupled to said first terminal;

    a capacitor coupled between said non-inverting input terminal and said output terminal; and

    a potentiometer coupled between said output terminal and said second terminal and having a moveable tap coupled to said inverting input terminal.

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