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Class Information
Number: 367/900
Name: Communications, electrical: acoustic wave systems and devices > Sonar time varied gain control systems
Description: Sonar systems in which the amplification factor of a receiver is changed as a function of expected attenuation of the received signal.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8670290 Method for determining the location of an impact on a surface of an object Mar. 11, 2014
7522472 Obstacle detection system Apr. 21, 2009
7106657 Digital sounder module and method for detecting Sep. 12, 2006
6950372 Digital sounder module and method for detecting Sep. 27, 2005
6185505 Broad ocean bathymetric fix Feb. 6, 2001
5455805 Ultrasonic measuring apparatus having adjustable gain control Oct. 3, 1995
5425000 Spatial rejection of direct blast interference in multistatic sonars Jun. 13, 1995
5392257 Sonar receiver with improved time varied gain correction Feb. 21, 1995
5260912 Side-looking fish finder Nov. 9, 1993
5260910 High resolution acoustic pulse-echo ranging system Nov. 9, 1993
5150334 System and method for ultrasonic measurement of material level Sep. 22, 1992
5121364 Time frequency control filter for an ultrasonic imaging system Jun. 9, 1992
5068833 Dynamic control circuit for multichannel system Nov. 26, 1991
5058083 Flexducer preamplifier power controller Oct. 15, 1991
5046053 Acoustic signal detection circuit Sep. 3, 1991
5043950 Apparatus and method for distance determination Aug. 27, 1991
5012449 Sonic flow meter Apr. 30, 1991
4975889 Acoustic ranging apparatus and method Dec. 4, 1990
4955000 Ultrasonic personnel location identification system Sep. 4, 1990
4935884 Sonic pipe length detector Jun. 19, 1990
4873676 Sonar depth sounder apparatus Oct. 10, 1989
4858203 Omnidirectional distance measurement system Aug. 15, 1989
4829490 Electrical signal discrimination May. 9, 1989
4785429 Range control system Nov. 15, 1988
4675854 Sonic or ultrasonic distance measuring device Jun. 23, 1987
4644512 Sonar depth finder with relative depth LCD display Feb. 17, 1987
4464738 Sonar distance sensing apparatus Aug. 7, 1984
4452085 Method and means for generating time gain compensation control signal for use in ultrasonic scanner and the like Jun. 5, 1984
4451909 Ultrasonic wave distance detection system May. 29, 1984
4439846 Sonar rangefinder system Mar. 27, 1984
4420824 Sonar apparatus having improved gain control Dec. 13, 1983
4415897 Precision control of RF attenuators for STC applications Nov. 15, 1983
4413518 Apparatus and method for measuring the extension of bolts under stress Nov. 8, 1983
4398423 Ultrasonic signal processing apparatus Aug. 16, 1983
4378596 Multi-channel sonic receiver with combined time-gain control and heterodyne inputs Mar. 29, 1983
4375166 Ultrasound examination apparatus comprising a mosaic of transducers of an electrostrictive material Mar. 1, 1983
4316270 Digital time-delay beamformer for sonar systems Feb. 16, 1982
4315325 Echo ranging pulse discrimination circuit Feb. 9, 1982
4307456 Ultrasonic rangefinder Dec. 22, 1981
4274148 Digital time-delay beamformer for sonar systems Jun. 16, 1981
4264788 Damped ultrasonic detection unit Apr. 28, 1981
4221004 Adjustable ultrasonic level measurement device Sep. 2, 1980
4208731 Method and device for determining the geometrical outline of the underwater part of icebergs and the draught thereof Jun. 17, 1980
4204281 Signal processing system for underwater transducer May. 20, 1980
4197750 Ultrasonic imaging apparatus operating according to the impulse-echo method Apr. 15, 1980
4198702 Time varying gain amplifier for side scan sonar applications Apr. 15, 1980
4197528 Movement-detecting processing circuit for an ultrasonic detection system Apr. 8, 1980
4169255 Automatic noise suppression system for acoustic height sensor Sep. 25, 1979
4145741 Signal processing arrangements Mar. 20, 1979
4103278 Obstacle detecting apparatus using ultrasonic waves Jul. 25, 1978

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