Digital-to-Analog Converter Error Feedback for Higher Output Accuracy
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Solution Overview
Problem
Digital-to-analog converters face limitations in achieving high output accuracy due to their binary input nature, which results in input errors when dealing with floating-point values, and increasing resolution is costly and impractical.
Innovation Solution
A method and device that calculate and adjust integer input values based on output errors, comparing them against preset thresholds to accumulate and correct errors, effectively enhancing output accuracy without requiring higher-resolution converters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a higher-resolution digital-to-analog converter is chosen to achieve higher output accuracy, then the output accuracy is improved, but the cost increases
Solution Approach 1:
The patent segments the input value into integer and decimal portions. The integer portion is processed by a low-resolution DAC, while the decimal portion is handled through error calculation and compensation mechanisms. This segmentation allows the system to achieve high effective resolution without requiring a high-resolution DAC, thereby reducing cost while maintaining output accuracy.
Solution Approach 2:
The patent implements feedback by calculating output errors based on the decimal portion of input values and using these errors to adjust subsequent integer inputs. The error accumulation and compensation mechanism creates a feedback loop that corrects the inherent precision limitations of low-resolution converters, achieving high output accuracy without high-resolution hardware.
2Ease of manufacture
If a low-resolution digital-to-analog converter is used, then the cost is reduced, but the output accuracy deteriorates due to input errors from ignoring decimal portions
Solution Approach 1:
The system calculates output errors resulting from ignoring decimal portions and feeds this error information back into the input adjustment mechanism. By accumulating errors and adjusting integer inputs accordingly, the system compensates for the precision loss inherent in low-resolution converters, maintaining output accuracy while using cost-effective hardware.
Solution Approach 2:
The patent dynamically changes the integer input parameter based on accumulated output errors. Instead of using fixed integer inputs, the system adjusts the integer portion of inputs in real-time based on error accumulation, effectively transforming the static low-resolution output into a dynamic high-precision output through parameter modulation.
3Ease of operation
If integer values are continuously inputted without adjustment, then the operation is simple, but the accumulative output error increases over time
Solution Approach 1:
The system automatically adjusts the integer input parameter based on accumulated errors, transforming the simple but inaccurate continuous integer input into an adaptive input sequence. The adjustment mechanism modifies inputs dynamically while maintaining operational simplicity through automated error compensation, preventing accumulative error without requiring complex manual intervention.
Data Source
AI summary
Disclosed are a method and a device for improving an output accuracy of a digital-to-analog converter. The method includes: calculating an output error of the digital-to-analog converter based on output accuracy and an input error of the digital-to-analog converter; obtaining at least one of the output error, comparing the at least one output error against a preset threshold, and adjusting an integer input value of the digital-to-analog converter according to a comparison result.