Back to results
US 4,156,823 AGranted
Method for damping an ultrasonic transducer
OwnerHideyuki Suzukiinventor
Life of this patent
Estimating the term…
Abstract
In an ultrasonic wave generator or receiver using an ultrasonic wave transducer, a negative immittance converter is inserted in a circuit of the generator or receiver in order to cancel components which impede the damping characteristics of the ultrasonic transducer.
Claims4
In an ultrasonic wave transmitter comprising a signal generator, an amplifier for amplifying the output of the signal generator, and an ultrasonic transducer driven by the amplifier;
- a method for damping the ultrasonic transducer by inserting a negative immittance converter between the amplifier and the ultrasonic transducer so as to generate a negative immittance to cancel components which impede the damping characteristics of the ultrasonic transducer including the output impedance of the amplifier, the damping impedance of the ultrasonic transducer and the connecting impedance between the amplifier and the ultrasonic transducer.
In an ultrasonic wave receiver comprising an ultrasonic transducer and a pre-signal amplifier amplifying the output of the ultrasonic transducer;
- a method for damping the ultrasonic transducer by inserting a negative immittance converter between the ultrasonic transducer and the amplifier so as to generate a negative immittance to cancel components which impede the damping characteristics of the ultrasonic transducer including the damping impedance of the ultrasonic transducer, the input impedance of the pre-signal amplifier and the connecting impedance between the pre-signal amplifier and the ultrasonic transducer.
Dependencies are inferred from the claim text.