G - Physics – 01 – S
Patent
G - Physics
01
S
349/36
G01S 7/52 (2006.01) G01S 7/62 (2006.01) G01S 15/02 (2006.01)
Patent
CA 1243107
ABSTRACT: "Device for the scanning of media by means of ultrasound echograhphy". A device for the scanning of media by means of ultrasound echography, comprising at least one ultrasonic transducer (10) which is associated with a transmitter stage (50) and with a receiver stage which comprises a conventional first processing circuit (101, 102, 103) and a second processing circuit which is connected parallel thereto and which comprises a series connection of a circuit (210) for automatic gain con- trol as a function of the distance of the echos, a heterodyne circuit (230), and n parallel channels, each of which comprises a series connec- tion of a circuit for the correction of diffraction effects, a filter (240a...240n) for selecting a narrow frequency band from the pass-band of the transducer, a logarithmic amplifier (250a...250n) and a divider (260a...260n) whose output is connected to one of the n inputs of a cir- cuit (270) for determining values whose output is connected to the dis- play device provided in the first processing circuit.
478500
N.v.philips'gloeilampenfabrieken
Van Steinburg C.e.
LandOfFree
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