Analog-to-digital converter output signal processing system and method

Abstract

The invention discloses an analog-to-digital converter output signal processing system and a method. XOR operation processing respectively on N-1 to-be-processed valid bit signals outputted by an analog-to-digital converter and reference valid bit signals is carried out by an intermediate processing module, randomized processing on interference signals possibly contained in the N valid bit signals is carried out, as the randomized processing on the interference signals is carried out, power of the interference signals in the N valid bit signals outputted by the analog-to-digital converter is greatly reduced, so N-1 intermediate processing signals having relatively high signal-to-noise ratio are acquired, XOR operation processing respectively on the N-1 intermediate processing signals and the reference valid bit signals is carried out to acquire N-1 post processing signals, the N-1 post processing signals are contrasted with the N-1 to-be-processed valid bit signals, the power of the interference signals contained in the N-1 post processing signals is relatively small, and thereby the signal-to-noise ratio of output signals of the analog-to-digital converter is improved.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to an analog-to-digital converter output signal processing system and method. Background technique [0002] As an electronic component that converts analog signals into digital signals, analog-to-digital converters are widely used in integrated circuits. [0003] However, due to the influence of external factors such as ground coupling interference signals, frequency points of interference signals are often mixed in the frequency spectrum of the digital signal output by the analog-to-digital converter, thereby reducing the signal-to-noise ratio of the output signal of the analog-to-digital converter. [0004] From the above, it can be seen that how to improve the signal-to-noise ratio of the output signal of the analog-to-digital converter is an urgent problem to be solved at present. Contents of the invention [0005] In view of this, the object of the present inventio...

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Problems solved by technology

[0003] However, due to the influence of external factors such as ground coupling interference signals, the frequency spectrum of the digital signal output by the analog-to-digital converter is often mixed with the frequency points of the interference signal, thereby reducing the signal-to-noise ratio of the output signal of the analog-to-digital converter

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