The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 20, 1976
Filed:
May. 17, 1974
Thomas M Frederiksen, San Jose, CA (US);
William M Howard, Campbell, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A sonar system utilizing a common LC tuned circuit for both the transmitter portion and the receiver portion of the electronic system so that both receiver and transmitter are tuned to the same frequency. The transducer is isolated from the LC tuned circuit so that the impedance characteristics of the transducer will not operate to change the main frequency of the tuned circuit. Thus interchangeable transducers may be utilized with the receiver-transmitter circuitry. The transmitter power pulses are generated by a novel Class C pulse circuit providing short time width, high intensity power pulses to the transducer.