Accession Number : ADD014965

Title :   Acoustic Transponder Receiver Circuit.

Descriptive Note : Patent, Filed 7 Dec 88, patented 16 Apr 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Cyr, Reginald

Report Date : 16 Apr 1991

Pagination or Media Count : 8

Abstract : A transponder that responds differently to two different input signals. The first input signal is at a first frequency. The first input signal is detected by a first powered detector that operates at the first frequency. The transponder responses in a first mode to the first input signal. The second input signal consists of short pulses at the first frequency and at a second frequency. The transponder responds to short pulses at the first frequency by powering a second detector. The first and second detector then detect the second input signal. The transponder responds in a second mode to the second input signal. (Author)

Descriptors :   ACOUSTIC DETECTORS, ACOUSTIC EQUIPMENT, CIRCUITS, DETECTORS, FREQUENCY, INPUT, RESPONSE, SHORT PULSES, SIGNALS, TRANSPONDERS

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE