Low-noise high-frequency sonar band-pass filter circuit

Abstract

The utility model relates to a low-noise high-frequency sonar band-pass filter circuit, which is constructed on the basis of LTC1562-2 and comprises input ports Vin1 and Vin2 for receiving weak echo signals of a sonar transducer processed by an amplifier, and output ports Out1 and Out2 for outputting signals to a variable gain amplification circuit. The filter circuit is additionally provided with a plurality of element groups by taking the port as the center, the input port Vin1 is externally connected with a first element group, and the input port Vin2 is externally connected with a second element group. The cooperative working mechanism of the elements in the high-frequency sonar band-pass filter circuit ensures that weak echo signals received by the sonar transducer can be accurately processed according to a preset filtering path; finally, the effects of flat amplitude-frequency response and low circuit noise in a transmission band are achieved, and a high-quality signal processing basis is provided for a sonar receiver.

Images