Dual-Reference DAC Circuit for Higher Resolution Conversion
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Solution Overview
Problem
Existing digital-to-analog converters face challenges in achieving high resolution while maintaining cost-effectiveness and simplicity, particularly in signal processing applications.
Innovation Solution
A circuitry design utilizing two 12-bit digital-to-analog converters with different reference voltages and an addition circuit to achieve a 14-bit resolution, combining their outputs to enhance conversion quality without increasing complexity or cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a higher resolution digital-to-analog converter is used, then the conversion quality is improved, but the complexity and cost of the circuitry increases significantly
Solution Approach 1:
The patent divides a high-resolution conversion task into multiple lower-resolution converters working in parallel. Specifically, it uses multiple 12-bit DACs to achieve what would traditionally require a single high-resolution converter, thereby improving conversion quality while keeping individual converter complexity manageable through segmentation of the conversion function.
Solution Approach 2:
The patent combines the outputs of multiple digital-to-analog converters to achieve higher effective resolution. By merging the analog outputs of several 12-bit DACs with different reference voltages, the system achieves 14-bit or higher resolution conversion quality without requiring a single complex high-resolution converter.
2Measurement precision
If a higher resolution digital-to-analog converter is used, then the conversion quality is improved, but the cost of the circuitry increases significantly
Solution Approach 1:
The patent segments the high-resolution conversion requirement into multiple standard-resolution converters. By using several available 12-bit DACs instead of a rare and expensive high-resolution converter, the system achieves superior conversion quality while utilizing common, cost-effective components that are easier to manufacture and source.
Solution Approach 2:
The patent uses multiple copies of standard 12-bit DAC circuits to achieve the functionality of a single high-resolution converter. This copying approach allows the system to leverage mature, low-cost 12-bit converter designs rather than investing in expensive proprietary high-resolution converter hardware.
3Measurement precision
If a higher resolution digital-to-analog converter is used, then the conversion quality is improved, but the simplicity of the circuitry is reduced
Solution Approach 1:
The patent applies different reference voltages to different DAC channels, creating local quality variations that enable higher effective resolution. Each DAC operates with a specific reference voltage tailored to its position in the resolution hierarchy, allowing the system to achieve global high-resolution performance through localized parameter differentiation.
Data Source
AI summary
The disclosure relates to circuitry, systems, and methods for digital-to-analog conversion. In various examples, a corresponding circuitry may comprise a first digital-to-analog conversion circuit to provide a first analog output signal and a second digital-to-analog conversion circuit to provide a second analog output signal. The circuitry may comprise addition circuitry to provide a combined analog output signal from the first analog output signal and the second analog output signal. A first voltage reference circuit, connected with the first digital-to-analog conversion circuit to provide a first reference voltage and a second voltage reference circuit, connected with the second digital-to-analog conversion circuit to provide a second reference voltage may be provided. The first reference voltage and the second reference voltage may differ from each other.