Sonar receiver with improved time varied gain correction

Details Sonar receiver with improved time varied gain correction Sonar receiver with improved time varied gain correction

1993-08-23

1995-02-21

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Receiver circuitry

367 98, 367900, G01S 1500

Patent

active

053922573

ABSTRACT:
Individual elements of a sonar receiver transducer provide output signals in response to the receipt of acoustic energy and signals are processed to form one or more receiver beams for display. Each element output is provided to a preamplifier to which is applied a time varied gain function. The output signal of at least one of the preamplifiers is additionally provided to an adaptive time varied gain circuit which generates an error signal for correction of the time varied gain function applied to the preamplifiers.

REFERENCES:
patent: 3763490 (1973-10-01), Hadley et al.
patent: 4316270 (1982-02-01), van't Hullenaar

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