Pipeline ADC Dynamic Gain Compensation for Output Accuracy
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Solution Overview
Problem
The gain parameter of amplification circuits in pipeline analog-to-digital conversion apparatuses is affected by environmental factors and signal intensities, leading to inaccuracies in output accuracy without appropriate compensation mechanisms.
Innovation Solution
An analog-to-digital conversion apparatus with dynamic gain compensation mechanism, utilizing a first and second stage conversion circuit, gain calculation, control, and compensation gain generation circuits to perform correlation calculations and establish a look-up table for accurate compensation, ensuring precise digital output signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If amplification circuits are used in pipeline analog-to-digital conversion apparatus, then signal amplification capability is improved, but gain parameter accuracy deteriorates due to environmental factors and signal intensity variations
Solution Approach 1:
The patent implements a feedback mechanism where the digital residue is fed back through a digital-to-analog converter and amplifier to generate a feedback signal. This feedback signal is correlated with the pseudo-noise sequence to calculate the actual gain parameter, which is then used to compensate for gain errors in the conversion result, thereby resolving the accuracy deterioration caused by environmental factors and signal intensity variations
Solution Approach 2:
The patent dynamically adjusts the gain parameter by calculating the correlation between the feedback signal and pseudo-noise sequence. This parameter change approach allows the system to adapt to environmental factors and signal intensity variations, converting the static gain parameter into a dynamic compensated value that maintains accuracy across different operating conditions
2Measurement precision
If dynamic gain compensation mechanism is implemented, then output accuracy is improved, but device complexity increases due to additional circuits
Solution Approach 1:
The patent achieves multi-functionality by using the same amplifier circuit for both the primary signal amplification and the feedback signal generation. The digital-to-analog converter serves dual purposes by converting both the residue signal and the compensation signal. This universal approach allows the additional compensation functions to be integrated into existing circuit structures, minimizing the increase in device complexity while still improving output accuracy
Data Source
AI summary
The present disclosure discloses an analog-to-digital conversion apparatus. A first stage conversion circuit receives an analog input signal to generate a digital conversion result. A second stage conversion circuit calculates an analog residue between the analog input signal and the digital conversion result and feeds a pseudo-noise to generate and amplify a feeding result to generate a digital residue for a gain calculation circuit to perform correlation calculation with the pseudo-noise to generate a compensation gain. A control circuit controls the first stage conversion circuit to operate according to output resolutions to establish a look-up table for a compensation gain generation circuit to look up to retrieve one of the interval gain values as a compensation gain value. An output calculation circuit compensates an added result of the digital conversion result and the pseudo-noise to further add a compensation result with the digital residue to generate a digital output signal.