Automatic Signal Delay Alignment in Waveform Generators
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Solution Overview
Problem
The alignment of digital marker signals with data signals in signal generation systems is challenging due to delays in the travel paths of analog and digital signals, which become significant at higher sampling rates, leading to inaccurate results and user inconvenience.
Innovation Solution
A system and method that include a delay determining unit to calculate the relative delay between signals and a programmable delay circuit within the waveform generator to automatically align the output of one signal with respect to another, ensuring precise timing alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual delay adjustment is used to align digital marker signals with data signals, then alignment accuracy can be improved, but user convenience deteriorates and time consumption increases
Solution Approach 1:
The system automatically measures and adjusts signal delays without requiring manual user intervention. The delay measurement unit self-calibrates the system by detecting actual signal travel times through the analog and digital paths, and the delay adjustment unit autonomously compensates for path mismatches, making the alignment process self-service and eliminating manual adjustment requirements
Solution Approach 2:
The system implements a feedback mechanism where the delay measurement unit continuously monitors the actual travel time differences between analog and digital signal paths, and this measurement feedback is used by the delay adjustment unit to dynamically compensate for path delays, ensuring accurate alignment while eliminating manual intervention
2Measurement precision
If manual delay adjustment is used to align digital marker signals with data signals, then alignment accuracy can be improved, but time consumption increases
Solution Approach 1:
The system performs preliminary automatic delay measurement and adjustment during the initialization phase or before signal generation begins. The delay measurement unit pre-calculates the path differences, and the delay adjustment unit pre-compensates for these differences, so that when actual signal generation occurs, the alignment is already established, eliminating time-consuming manual adjustments during operation
Solution Approach 2:
The system automatically measures and adjusts signal delays without requiring manual user intervention. The delay measurement unit self-calibrates the system by detecting actual signal travel times through the analog and digital paths, and the delay adjustment unit autonomously compensates for path mismatches, making the alignment process self-service and eliminating manual adjustment requirements
3Ease of operation
If signal paths are simplified to reduce delay differences, then alignment becomes easier, but signal generation functionality deteriorates
Solution Approach 1:
The delay adjustment unit acts as an intermediary component that is inserted into the digital signal path. This intermediary element introduces programmable delay to match the analog path travel time, allowing the system to maintain separate and optimized analog and digital signal paths while achieving synchronization through the mediating delay adjustment unit, thus preserving full signal generation functionality
4Adaptability or versatility
If separate analog and digital signal paths are used, then signal generation versatility is improved, but delay alignment difficulty increases
Solution Approach 1:
The system segments the signal generation functionality into separate analog and digital paths, each optimized for its specific function. The analog path handles continuous waveform generation while the digital path handles marker signal generation and control. This segmentation allows each path to be independently optimized for its purpose while the delay measurement and adjustment units coordinate between them to achieve synchronization
Solution Approach 2:
The delay adjustment unit acts as an intermediary component that is inserted into the digital signal path. This intermediary element introduces programmable delay to match the analog path travel time, allowing the system to maintain separate and optimized analog and digital signal paths while achieving synchronization through the mediating delay adjustment unit, thus preserving full signal generation functionality
Data Source
AI summary
In one embodiment, a system comprises a delay determining unit that may be operable to determine a relative delay between the first signal provided by the first source and the second signal provided by the second source, based upon a travel path of the first signal and a travel path of the second signal. In addition, a delay circuit, comprised within the waveform generator, may be configured to be programmed to delay output of the first signal to output the first signal at a predetermined position with respect to output of the second signal, based on the determined relative delay. More specifically, in one embodiment, the delay circuit may be configured to be automatically programmed to add the relative delay to the output of the first signal to automatically align the output of the first signal with respect to the output of the second signal.