Parallel time-alternating high-speed sampling system based on multiple ADCs

Abstract

A parallel time-alternating high-speed sampling system based on multiple ADCs belongs to the field of communication and comprises a signal conditioning module, a signal acquisition module, a clock generation and distribution module, a logic control module, a data storage module, an interface module and a power supply module. After an analog input signal enters the signal conditioning module, an analog-to-digital converter (ADC) collects the conditioned analog signal after receiving a clock signal, then the converted digital signal is input into the logic control module to be subjected to data processing, the data storage module achieves data storage, and finally the data can be uploaded to a computer through the interface module. The signal conditioning module is mainly used for conditioning an analog signal by a differential amplifier, including filtering and amplification of the analog signal and conversion from a single-ended signal to a differential signal. The signal acquisition module is composed of four ADCs of the same model, and after clock signals are received, high sampling rate and high resolution of the sampling system are achieved through parallel time alternating sampling.

Description

technical field [0001] The invention belongs to the field of communication technology, and it is a kind of sampling based on multi-chip low-speed and high-resolution analog-to-digital converters (ADC) that adopts parallel time alternate sampling, and finally realizes the sampling requirements of the system's high sampling rate and high resolution through data splicing System, widely used in radar, aerospace, measurement and control, earthquake, medical, instrumentation, image and other modern electronic equipment. Background technique [0002] Non-electrical signals in nature, such as sound, temperature, light, image, pressure, displacement, acceleration, etc., can be converted into electrical signals by corresponding sensors. After the sensor collects the analog signal, it needs to be transmitted to the computer for signal reconstruction, processing, analysis, display, storage, and intelligent operation. However, since the information analyzed, processed, transmitted, and s...

AI Technical Summary

Problems solved by technology

As the two most important performance indicators of ADCs, sampling speed and precision are also a pair of mutual constraints. It is difficult to achieve high sampling rate while maintaining high resolution and excellent dynamic performance with a single-chip ADC.

This problem is not only a design and process problem of integrated circuits, but also one of the bottlenecks in the development of high-speed data acquisition and high-speed digital signal processing.

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