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Medical ultrasonic imaging system with three-state ultrasonic pulse and improved pulse generator

  • US 6,432,055 B1
  • Filed: 06/30/2000
  • Issued: 08/13/2002
  • Est. Priority Date: 06/30/2000
  • Status: Expired due to Term
First Claim
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1. A transmit waveform generator for a medical ultrasonic imaging system, said generator comprising:

  • a primary transformer winding;

    a first switching circuit coupled to both sides of the primary winding and operative to provide a low resistance path across the primary winding when the first switching circuit is in a closed-circuit state;

    a secondary transformer winding inductively coupled with the primary transformer winding and adapted to be coupled with a transducer element;

    said first switching circuit operative when in the closed circuit state to drive the transducer element to a baseline voltage.

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