Large dynamic range signal acquisition circuit

Through the design of signal equal division, feature extraction and attenuation control, a single signal channel is used to achieve signal acquisition with a large dynamic range, which solves the problem of high signal acquisition cost in the existing technology, realizes high-quality signal acquisition from millivolt to kilovolt level, and reduces the number of channels and test costs.

CN120785345APending Publication Date: 2025-10-14NORTHWEST INST OF NUCLEAR TECH
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Patent Information

Application Number
CN202510870618.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-26
Publication Date
2025-10-14

AI Technical Summary

Technical Problem

Existing large dynamic range acquisition circuits require more channels for range overlap when accurately acquiring signals in a larger range, resulting in higher signal acquisition costs.

Method used

A power divider, M comparators, an attenuation chain, an ADC conversion module, a splicing circuit, and an FPGA are used. Through signal equalization, feature extraction, and attenuation control design, a large dynamic range acquisition of a single signal channel is achieved. High-speed GaN MOS switches and a stepped multi-stage attenuation chain are used to automatically select the attenuation multiple.

Benefits of technology

It realizes the high efficiency of a single signal channel, adopts the design method of signal, etc., adopts a single signal channel to realize signal acquisition with a large dynamic range, and the range coverage range is from millivolt to kilovolt, which saves the number of channels and reduces the test cost.

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Abstract

The invention provides a novel large dynamic range signal acquisition circuit, which is used for solving the technical problem of high signal acquisition cost caused by the fact that more channels are needed to carry out measuring range lap joint if an existing large dynamic range acquisition circuit needs to finely acquire signals in a larger range. The large dynamic range signal acquisition circuit provided by the invention comprises a power divider, M comparators, an attenuation link, an ADC conversion module, a splicing circuit and an FPGA, large dynamic range signal acquisition can be realized by adopting a single signal channel through a design method of signal equal division, feature extraction and attenuation control, the range coverage range is from a millivolt level to a kilovolt level, and the measurement range is wide. The signal acquisition range is widened, the number of channels is reduced, the economic use efficiency of the channels is improved, the test cost is saved, and the analog-to-digital conversion method has important significance on analog-to-digital conversion of uncertain amplitude signals in a specific environment.
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