Aggressor IC Frequency Configuration to Prevent Spur Interference
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Solution Overview
Problem
Existing techniques are inadequate in effectively mitigating spur interference between integrated circuits (ICs) in electronic devices, leading to signal degradation and noise mixing due to operating frequency overlap.
Innovation Solution
An aggressor IC sends protection information to a victim IC to configure its operations, avoiding frequencies that could interfere, using spur cancellation circuits and dynamic frequency adjustments based on operating status analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple ICs operate at different frequencies in close proximity, then functional versatility is improved, but spur interference between circuits increases
Solution Approach 1:
The victim IC performs frequency analysis and generates protection information in advance before the aggressor IC operates. This preliminary action identifies frequencies to be protected and communicates them to the aggressor IC, allowing the aggressor to adjust its operating parameters beforehand to avoid generating harmful spurs that would interfere with the victim IC's operation.
Solution Approach 2:
The system establishes a feedback loop where the victim IC monitors its operating frequencies, analyzes potential interference, and communicates protection requirements back to the aggressor IC. The aggressor IC then adjusts its operation based on this feedback, creating a closed-loop system that dynamically prevents spur interference while maintaining functional versatility.
2Reliability
If frequency planning techniques are used to avoid interference, then signal quality is improved, but system complexity increases
Solution Approach 1:
The victim IC autonomously performs frequency analysis of its own operating signals and automatically generates protection information without requiring external intervention. This self-service approach simplifies the overall system by eliminating the need for complex external frequency planning tools or manual configuration, while still achieving high signal quality through automated interference prevention.
3Object-generated harmful factors
If clock spreading techniques are applied to mitigate spurs, then interference reduction is achieved, but operational precision deteriorates
Solution Approach 1:
Instead of spreading the clock signal over time (which degrades precision), the system changes the frequency parameter of the aggressor IC to avoid generating spurs at the victim IC's operating frequencies. This parameter change approach maintains the aggressor IC's operational precision while still achieving interference mitigation by selecting frequencies that do not create harmful interactions.
Data Source
AI summary
Embodiments relate to identifying frequencies to be protected at a victim integrated circuit (IC) and sending protection information including the identified frequencies to an aggressor IC. The aggressor IC configures its subsystems or circuits to operate using operating frequencies that prevents spurs that may interfere with the frequencies identified in the protection information. If not all of the frequencies in the protection information can be protected, the aggressor IC selects a subset of the frequencies to be protected. Then, the aggressor IC configures the operating frequencies of its subsystems or circuits so that spurs that they generate do not interfere with the selected frequencies.