Accession Number:

ADD015336

Title:

Flexducer Preamplifier Power Controller.

Descriptive Note:

Patent, Filed 7 Dec 90, patented 15 Oct 91,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1991-10-15

Pagination or Media Count:

8.0

Abstract:

Linear and switching amplifiers associated with acoustic transducers require a gradual turn-on rather than an abrupt full-power level signal. A transducer preamplifier power controller circuit prevents the operation of fuses and the tripping of circuit breakers when the relatively high power driving levels for a sonar transducer are initiated. The controller circuit gradually increases a signal level from a zero level to a maximum during the initiation of a sonar signal using a threshold level that is set to a fraction of th expected maximum, and two discrete clock frequencies, for example at 1 MHz and 2 KHz actuate interconnected digital control elements incrementally to increase the signal level during a predetermined period. This cycle is re-initiated by the next sonar signal.

Subject Categories:

  • Electrical and Electronic Equipment
  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE