High-precision ultrasound signal generator

Abstract

The invention relates to a high-precision ultrasound signal generator, comprising a singlechip, a numerical frequency-generating chip, a power amplifier, a load, a feedback current parameter-pretreating network and a process experience database, wherein the signal output control end of the singlechip is connected with the signal input end of the numerical frequency-generating chip, the signal output end phase of the numerical frequency-generating chip is connected with the signal input end of the power amplifier, the signal output end of the power amplifier is connected with the signal sampling end of the load, the feedback current effective value-processing end of the feedback current parameter-pretreating network is connected with the signal sampling end of the load, the signal A / D converting end of the feedback current parameter-pretreating network is connected with the signal input end of the singlechip, and the process experience database is stored in the singlechip and is connected with the signal input end of the numerical frequency-generating chip by the signal output end of the singlechip. The ultrasound signal generator has the advantages of strong signal stability and adaptive capability of load.

Description

technical field [0001] The invention relates to a high-precision ultrasonic signal generator, in particular to a medical digital ultrasonic signal generator. Background technique [0002] In recent years, ultrasonic diagnostic technology has been greatly developed and tends to be mature. The ultrasonic signal generating device is generally composed of an ultrasonic signal generating circuit, a circuit signal conditioning circuit, a power amplifier circuit, and a load resonance matching circuit. Electrical signals in the ultrasonic frequency range are converted into ultrasonic signals by ultrasonic transducers. Due to their specific mechanical mechanism characteristics, the commonly used ultrasonic transducers have time drift, temperature drift, frequency drift and other shortcomings that seriously affect the ultrasonic signal. Stable output. [0003] In order to overcome the above shortcomings, the main solution is to improve the mechanical structure of the ultrasonic tran...

AI Technical Summary

Problems solved by technology

However, various ultrasonic signal generators based on single-chip microcomputer control cause changes in load feedback signal parameters due to signal interference, resulting in feedback signal distortion and affecting the judgment of the single-chip microcomputer on the load working state. Therefore, high-precision signal feedback circuit design is very important.

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