Patent ID: 7670290
Filing Date: 2010-03-02
Classification: A61B,B06B,G01S

Abstract:
1. A method of tuning a transducer circuit comprising the steps of: providing the transducer circuit having an ultrasonic transducer that includes at least one reactance characteristic and an operating frequency range, the ultrasonic transducer comprising a capacitive microfabricated electrostatic transducer, and at least one signal path that is electrically coupled to the ultrasonic transducer, the at least one signal path including a receive signal path, the receive signal path receiving an electric receive signal generated with transduction from ultrasound energy by the ultrasonic transducer and outputting the electric receive signal to an imaging system, wherein the at least one signal path further includes a transmit signal path; and inserting a balancing circuit into the at least one signal path to substantially balance the at least one reactance characteristic of the ultrasonic transducer over the operating frequency range, the balancing circuit comprising an active circuit; wherein the balancing circuit is inserted into the receive signal path.