Accession Number : AD0755174

Title :   An Electrical Load for Simulating a Transducer in an Array.

Descriptive Note : Technical memo.,

Corporate Author : TEXAS UNIV AUSTIN APPLIED RESEARCH LABS

Personal Author(s) : Truchard,James J. ; Nowlin,William C.

Report Date : 17 DEC 1972

Pagination or Media Count : 20

Abstract : Individual transducer elements of large sonar arrays are subject to electrical impedance changes as a result of acoustical interactions between neighboring driven elements. In order to transmit acoustic power, the elements are driven individually or in groups by power amplifiers. When a prototype amplifier is constructed, an entire array of transducers and amplifiers may not be available for testing the amplifier. A passive electrical dummy load was constructed to have impedance characteristics equivalent to the particular type of transducer which a prototype current-source switching amplifier was to drive. An active port was added to the electrical dummy load to change the amplifier's load impedance at all frequencies of interest, thereby simulating different positions in a transducer array in which more than one element is driven. The dummy load design technique is described. (Author)

Descriptors :   (*SONAR ARRAYS, ELECTRICAL IMPEDANCE), TRANSDUCERS, SIMULATION, POWER AMPLIFIERS

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE