An analog signal acquisition method and device

Abstract

The invention provides a method and a device for acquiring analog signals. The method includes inputting standard voltages into an analog input end of an analog-digital converter; inputting to-be-measured analog signals into a reference voltage end of the analog-digital converter; acquiring digital signals outputted by the analog-digital converter; acquiring values of the to-be-measured analog signals according to standard voltages and the digital signals. The method and the device in an embodiment of the invention have the advantages that high-order signals can be directly measured; the amplitude of the standard voltages can be lower than the values of the to-be-measured analog signals, accordingly, requirements on reference voltages can be lowered, and the analog signals can be measured by the aid of the standard voltages with the low amplitude; the measurement accuracy can be improved.

Description

technical field [0001] The invention relates to the technical field of analog signal acquisition, in particular to an analog signal acquisition method and device. Background technique [0002] The circuit that converts analog signals into digital signals is called an analog-to-digital converter (Analog to Digital Converter), that is, an AD converter. The mutual conversion between analog signal and digital signal is of great significance. First of all, digital signals have the advantages of simple structure, strong anti-interference ability, good stability, high degree of automation in design and testing, and easy realization of large-scale integration. Using digital signals to process analog signals in signal transmission, processing, storage, output and display Confidentiality and other aspects have very obvious advantages. Secondly, with the advancement of integrated circuit technology and the rapid development of digital integrated circuit technology, the performance of...

AI Technical Summary

Problems solved by technology

[0008] The embodiment of the present invention provides an analog signal acquisition method and device, which are used to solve the problems of the existing analog signal acquisition method that the range is restricted by the reference voltage of the analog-to-digital converter, the measurement power consumption is large, and the measurement accuracy of small signals is reduced.

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