Eight-channel amplifier module and combined multi-beam depth finder receiving amplifier

Abstract

The invention relates to the technical field of electronic circuits, in particular to an eight-channel amplifier module and a modularly-combined multi-beam depth sounder receiving amplifier. Comprising a PCB, two sets of amplifying circuits are arranged on each of the front face and the back face of the PCB, and a power line and a control line which are connected with the amplifying circuits are arranged on the middle layer of the PCB; the amplification circuit is divided into five stages, namely an input matching circuit, a pre-stage controllable gain amplifier, a pre-stage active filter, a post-stage controllable gain amplifier and a post-stage active filter which are connected in sequence; the input matching circuit, the pre-stage controllable gain amplifier, the pre-stage active filter, the post-stage controllable gain amplifier and the post-stage active filter are arranged in a line, and the multi-beam depth finder receiving amplifier is modularly combined. Comprising a receiver base, a transducer, a mother board and the eight-channel amplifier module. The invention provides an 8-channel amplifier module suitable for electronic circuits requiring modular stack mounting.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to an 8-channel amplifier module and a modularly combined multi-beam sounder receiving amplifier. Background technique [0002] As a means of efficient underwater measurement, the multi-beam echo sounder has more and more extensive application requirements. Domestic multi-beam has also gradually been verified and approved by users. Due to the large number of receiving channels of the multi-beam, the overall composition is complicated, and the channel consistency is high, it brings a lot of workload and technical difficulties to the production and maintenance of the multi-beam, which pushes up the manufacturing cost. [0003] This type of multi-beam receiving amplifier consists of 80 channels, which is equivalent to the centralized installation of receiving amplifiers of 80 single-beam depth sounders. Due to the limitation of the principle structure and volume, the circ...

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Problems solved by technology

Due to the limitation of the principle structure and volume, the circuits must be densely arranged, which is prone to mutual interference or self-excitation

[0004] The 80 channels need to ensure the consistency of gain and phase. Each signal amplifier needs to be accurately debugged. The workload is quite large, and it is difficult to judge and solve mixed faults.

Once disturbed or self-excited, it is quite difficult to solve

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