A Data Adaptive Measurement Method Based on Multistage Amplifying Circuit

Abstract

The invention discloses a self-adaptive measurement method of data based on a multistage amplification circuit. The self-adaptive measurement method comprises the following steps of: (1) gating an output signal of a jth-stage amplifier through an analog switch, and carrying out analog-to-digital conversion processing on the output signal of the jth-stage amplifier, wherein an initial value of j is n; n is a positive integer, which is greater than or equal to 2; (2) carrying out numerical processing on the data after analog-to-digital conversion processing and outputting a calculated value; (3) judging whether the calculated value is equal to a full bias value, if so, causing j to be equal to j-1 and returning the step (1); if not, turning to the step (4); and (4) obtaining a measured value of data to be measured according to the calculated value and the total amplification factor of the jth-stage amplifier. According to the self-adaptive measurement method, by adopting the analog switch to carry out intelligent switching and time-sharing gating on the multistage amplification output signal, processing through an A / D chip, and automatically collecting the optimal amplification output signal through utilizing the characteristic of full bias overflow of an operational amplifier, the self-adaptive collection is implemented; the self-adaptive measurement method can be applied to self-adaptive collection of the data within a wider range. The self-adaptive measurement method has the advantages of convenience for use, wide application range and high reliability.

Description

technical field [0001] The invention belongs to the application field of electronic equipment testing, and more specifically relates to a data self-adaptive measurement method based on a multi-stage amplifying circuit. Background technique [0002] In the process of circuit design, it is often necessary to collect data, and signal amplification circuits are generally used for data collection, so the design of signal amplification circuits is crucial to the accuracy of data collection. In the data acquisition circuit, single-stage operational amplification is generally used. However, after the configuration resistor is selected, the magnification of the single-stage amplifier circuit is fixed, so it is only suitable for amplifying and collecting data in a specific range. For data beyond this range, it may cause amplified and collected data. The data is inaccurate or full-bias overflow; another common method is to use multi-stage operational amplification. Although the number ...

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Problems solved by technology

[0003] Aiming at the defects of the prior art, the object of the present invention is to provide a data adaptive measurement method based on a multi-stage amplifying circuit, aiming at solving the narrow range, low precision and inflexibility of a certain range of data acquisition in the prior art question

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