Towed hydrophone preamplifier and receiver

Details Towed hydrophone preamplifier and receiver Towed hydrophone preamplifier and receiver

1976-01-05

1977-04-26

Birmiel, Howard A.

Communications: electrical

Selective

Having electron beam device

330 28, 330 35, 340 3T, 340 7R, 340 155TS, 340 10, G01V 118, G01V 138

Patent

active

040204502

ABSTRACT:
A hydrophone and preamplifier are coupled to receive signals representative f impinging acoustic energy. At the other end of a long length of two conductor coaxial cable, a receiver section provides representative voltage signals for following processing circuitry. DC power is fed to the preamp section along the single cable which also transmits the information current signals back to the receiver. The receiver section is designed to present a very low input impedance to enable the swamping out of the capacitive reactance introduced by the long cable. This allows the use of a long coaxial towing cable without introducing any appreciable frequency response degradation. Suitable electronic interconnection ensures that the preamplifier output signal is not affected by the supply voltage back at the receiver section and moderate potential variations between the cable ends do not introduce spurious noise components.

REFERENCES:
patent: 3255419 (1966-06-01), Knapton et al.
patent: 3452287 (1969-06-01), Busch et al.
patent: 3454891 (1969-07-01), Siegel
patent: 3913024 (1975-10-01), Necoechea
patent: 3939466 (1976-02-01), Horwath
patent: 3939468 (1976-02-01), Mastin
patent: 3953807 (1976-04-01), Schade, Jr.

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