Interleaved DAC Offset and Timing Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional inter-leaved digital-to-analog converters face challenges in maintaining consistent performance and signal precision, leading to distortion during high-speed conversion, as they often require expensive and high-speed converters that are not readily available on the market.
Innovation Solution
A method for adjusting the output offset, amplitude, and timing of inter-leaved digital-to-analog converters to minimize distortion by monitoring the signal spectrum and synchronizing the output of two converters operating under the same sampling rate, ensuring that the frequency components meet predetermined conditions to enhance signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If inter-leaved digital-to-analog converters are used to achieve high-speed conversion, then conversion speed is improved, but signal precision deteriorates due to performance differences between converters and difficulty in maintaining uniform switching intervals
Solution Approach 1:
The patent employs feedback mechanisms where the output signals from inter-leaved DACs are monitored and fed back to adjustment circuits. These circuits continuously adjust offset levels, amplitude levels, and timing of the DAC outputs to maintain signal integrity. The feedback loop detects performance variations between DACs and compensates for them, ensuring uniform switching intervals and consistent signal precision during high-speed conversion operations.
Solution Approach 2:
The patent adjusts multiple parameters of the inter-leaved DAC system including offset levels, amplitude levels, and timing parameters. By dynamically changing these parameters based on monitored signal characteristics, the system optimizes performance to maintain both high conversion speed and signal precision. The adjustment processes modify electrical parameters to compensate for variations between individual DAC units.
2Productivity
If conventional inter-leaved digital-to-analog converters are used, then high-speed conversion is achieved, but distortion increases due to performance variations between converters
Solution Approach 1:
Feedback circuits monitor the output signals from each DAC and detect distortion components. The detected information is used to adjust offset and amplitude parameters of the DACs in real-time, minimizing distortion while maintaining high conversion rates. The feedback mechanism continuously compensates for performance variations that would otherwise generate harmful distortion.
Solution Approach 2:
The patent converts the harmful effect of performance variations between DACs into a beneficial adjustment process. By monitoring the output signals and detecting variations, the system uses these variations as feedback to drive adjustment mechanisms that equalize DAC performance. The previously harmful performance differences become the basis for automated calibration and optimization.
3Manufacturing precision
If expensive high-speed converters are used to maintain signal precision, then signal integrity is improved, but cost increases significantly
Solution Approach 1:
The patent divides the high-speed conversion function into multiple lower-speed DAC units operating in an inter-leaved configuration. Instead of using a single expensive high-speed converter, the system segments the conversion task across multiple affordable DACs. Adjustment circuits then synchronize and equalize the outputs to achieve overall signal integrity comparable to expensive single-unit solutions at much lower cost.
Solution Approach 2:
The patent uses multiple copies of standard commercial DAC units instead of a single specialized high-speed converter. By inter-leaving multiple copies and adjusting their outputs, the system achieves high-speed conversion capability and signal integrity that would otherwise require expensive proprietary hardware. The adjustment processes make the copies function as a unified high-performance system.
Data Source
AI summary
Monitoring a spectrum of an inter-leaved signal by a signal generator which inter-leaves two DAC outputs with the same sampling rate, while adjusting the output offset level of each DAC, the output amplitude level of each DAC, the output selection timing of each DAC, and the output renewal timing of each DAC.