Echo amplification circuit of low-noise MEMS piezoelectric hydrophone

Abstract

The invention discloses an echo amplification circuit of a low-noise MEMS piezoelectric hydrophone. The echo amplification circuit mainly comprises an non-inverting amplification circuit and a voltagefollower circuit. The circuit is powered by an accurate voltage source. A proper static potential is provided for the non-inverting amplification circuit by using the follower circuit through resistance voltage division; by selecting an operational amplifier with low equivalent input noise voltage and low equivalent input noise current and reasonably selecting an external resistor, the echo amplification circuit has a certain filtering effect, meanwhile, the equivalent input noise of the circuit is reduced, and the signal-to-noise ratio of the signal is further improved. The circuit is convenient to adjust the static working point of the amplification circuit, the circuit is simplified by means of power supply of a single power supply, good in circuit stability, few in used devices, low in cost, convenient to connect with an external circuit due to the fact that input and output share the same interface, convenient to operate and certain in application value.

Description

technical field [0001] The invention belongs to the field of electronic circuits, in particular to a low-noise MEMS piezoelectric hydrophone echo amplifying circuit. Background technique [0002] The ocean is a treasure house of resources and the key to the long-term development of human society. The exploration and development of the ocean, the detection and management of its resources all rely on the acquisition of ocean information. Hydrophones are mainly used to pick up and analyze underwater sound waves, which is of great significance to the exploration and mining of marine resources. At present, the traditional hydrophone has the advantage of high sensitivity and occupies the mainstream position in the market, but it has the disadvantages of high cost, large volume, and difficulty in forming an array to cover a large area of ​​sea area. With the development of technology, hydrophones with low power consumption, low cost and long battery life are required to be used i...

AI Technical Summary

Problems solved by technology

At present, the traditional hydrophone has the advantage of high sensitivity and occupies the mainstream position in the market, but it has the disadvantages of high cost, large volume, and difficulty in forming an array to cover a large area of ​​sea area.

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