Sonar compensation transformer
Patent 4449068 Issued on May 15, 1984. Estimated Expiration Date: 
September 22, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 22, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2849075 3613068 Shoot through protected current driven transistor inverter circuit Drive circuits for a piezoelectric stack Matching network for switchable segmented ultrasonic transducers Circuit for alternate transmission and reception with only one sound source transducer Switch circuit for exciting ultrasonic transducer elements Patent #: 4357690 InventorsApplicationNo. 06/534901 filed on 09/22/1983US Classes:310/316.01, Input circuit for simultaneous electrical and mechanical output from piezoelectric element310/317, Input circuit for mechanical output from piezoelectric element367/903TRANSMIT-RECEIVE CIRCUITRYExaminersPrimary: Budd, Mark O.Attorney, Agent or FirmInternational ClassesG01S 1/72 (20060101)G01S 1/00 (20060101) AbstractA sonar compensation transformer is added to a sonar transceiver circuit to btain calibrated optimum performance from a sonar transducer using ceramic rings by slightly modifying the voltage of the transducer while at the same time allowing the transmit circuit to operate without appreciable change.The sonar compensation transformer is an improvement upon a conventional sonar transceiver circuit containing a transformer winding connected in series with a diode switch with the outer bounding connections of the transformer winding and the diode switch connected to the transducer element while the connection to the sonar transceiver is from a connection tapped into the winding of the sonar transformer and the connection from the outer bound of the diode switch. The sonar compensation transformer is connected in with a primary winding placed in parallel with the diode switch. The secondary winding is connected in the lead from the outside connection to the diode switch to the sonar transceiver, and is positioned to inductively interact with the primary winding placed in parallel across the diode switch. Proper design and adjustment of the secondary winding of the sonar compensation transformer provides the capability to slightly modify the voltage of any input acoustical signal to the sonar transducer to balance it in relation to other voltages received through similar circuits for other sonar transducer elements. | |
