Calibrated Jitter Injection Circuit for Signal Testing
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Solution Overview
Problem
Real-world communication channels introduce various distortions such as attenuation, jitter, and interference, making it challenging for electronic devices to accurately extract information from signals, and simulating these conditions is costly and complex.
Innovation Solution
A circuit that introduces calibrated amounts of jitter into signals, using electromagnetic interference generation circuitry, allows for the testing of signal-consuming equipment to verify its ability to extract information under specified distortion levels, emulating real-life channel conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If real-world communication channels are used to test signal extraction ability, then the testing reflects actual operating conditions, but the cost and complexity of setting up such channels increases significantly
Solution Approach 1:
The patent creates a simplified copy of real-world channel distortion effects using a distortion injection circuit that generates artificial jitter and interference. Instead of setting up complex physical communication channels, the invention copies the essential distortion characteristics (jitter, interference) and injects them directly into test signals, achieving reliable testing without the complexity of actual channel setups
Solution Approach 2:
The patent converts the harmful effect of electromagnetic interference into a useful testing mechanism. By deliberately injecting controlled amounts of interference and jitter through the distortion injection circuit, the invention transforms what would normally be unwanted noise into a valuable tool for verifying signal extraction robustness under realistic distortion conditions
2Reliability
If complex distortion channels are set up to simulate real-world conditions, then signal extraction robustness can be properly tested, but the cost of setting up and maintaining such channels increases
Solution Approach 1:
The invention copies only the essential distortion characteristics (jitter, interference patterns) that are most relevant to signal extraction, rather than replicating entire complex communication channels. This selective copying approach maintains testing reliability while dramatically reducing the cost and complexity of the test setup
Solution Approach 2:
The distortion injection circuit allows dynamic adjustment of distortion parameters such as jitter magnitude and interference levels. By enabling parameter changes, the system can test multiple scenarios using a single circuit configuration, eliminating the need for multiple fixed distortion channels and reducing overall system cost
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient testing of devices to ensure they can operate correctly under worst-case conditions by generating signals with predetermined distortions, verifying their tolerance and functionality before exposure to actual communication channels.
Implementation Method 1
to introduce jitter, the signal propagation channel passes close to electromagnetic interference generation circuitry
Data Source
AI summary
A circuit that introduces a calibrated amount of jitter and/or amplitude variation into a signal. By generating a signal with some predetermined amount of variation, signal consuming equipment may be tested to verify that it can properly extract the information from the signal, despite the presence of such variation. The circuit includes a signal propagation channel through which a signal may propagate. However, to introduce signal variation, the signal propagation channel passes close to electromagnetic interference generation circuitry. A calibration circuit has one or multiple settings that sets on or more values of parameters of the electromagnetic interference generation circuitry. During calibration, the parameters are adjusted until desired variation is detected, and which point the calibrated values are set and associated with that signal variation. This may be repeated for multiple calibration values and multiple settings. The ability to handle signals of different variances may then be accomplished.