Die-to-Die Links for RF Receiver Spur Cancellation
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Solution Overview
Problem
Current radio frequency (RF) receiver integrated circuits face challenges in spur cancellation, particularly when multiple receive paths are close together, making it difficult to adjust digital clock frequencies to avoid interfering spurs, and external host processor intervention is often slow to respond to rapid signal changes, leading to performance degradation with artifacts like pops/clicks in audio or freezes/glitches in video.
Innovation Solution
Die-to-die communication links within multi-die systems allow for direct communication of operating parameters between receiver integrated circuit dies, enabling rapid adjustment of receive path circuitry without external host processor intervention, including spur cancellation module operations, to effectively remove digital clock spurs and improve signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If frequency planning is used to adjust digital clock frequencies to avoid interfering spurs, then spur interference is reduced, but the system becomes difficult to implement and practically impossible when multiple receive paths are in close proximity
Solution Approach 1:
The system divides the frequency management function into separate segments: each receive path has its own digital clock with independently selectable frequencies, and spur cancellation modules are individually assigned to specific receive paths. This segmentation allows each path to be optimized independently while working together in the multi-die system.
Solution Approach 2:
The system changes the operating parameters (digital clock frequencies) of each receive path to avoid spur interference. By selecting from multiple pre-determined clock frequencies, the system can dynamically adjust parameters to place spurs outside the frequency range of channels being tuned, resolving the interference issue without complex centralized planning.
2Adaptability or versatility
If external host processor intervention is used to adjust receive path circuitry operation, then system-wide coordination is achieved, but the response speed is too slow to account for rapid changes in signal conditions
Solution Approach 1:
The patent merges the coordination function directly into the multi-die system by implementing die-to-die communication links between receiver integrated circuit dies. This allows receive path circuitry on different dies to exchange operating parameters and coordinate their operation directly, eliminating the need for external host processor intervention while maintaining system-wide coordination.
Solution Approach 2:
The die-to-die communication links serve as an intermediary mechanism between receiver integrated circuit dies. These links enable rapid exchange of operating parameters and coordination information between dies, providing a faster response path than external host processor communication while maintaining system-wide coordination.
3Productivity
If multiple receive paths are included in close proximity within a single integrated circuit or multi-chip package, then multiple different channels can be tuned simultaneously, but frequency planning becomes practically impossible to achieve
Solution Approach 1:
The system segments the frequency management responsibility by assigning separate digital clocks and spur cancellation modules to each receive path. This allows each path to independently manage its frequency relationships with other paths, making it feasible to have multiple receive paths in close proximity without requiring complex centralized frequency planning.
Solution Approach 2:
The system implements dynamic frequency selection where each receive path can independently select from multiple pre-determined clock frequencies based on current operating conditions. This dynamic adjustment capability allows the system to adapt to different channel combinations and avoid spur interference in real-time, making multi-path operation feasible without complex static frequency planning.
Data Source
AI summary
Die-to-die communication links for receiver integrated circuit dies within multi-die systems and related methods are disclosed for radio frequency (RF) receivers. The disclosed embodiments provide die-to-die communication links that allow for direct communication of operating parameters between receiver integrated circuit dies and other integrated circuit dies within a multi-die system so that the operation of receive path circuitry can be adjusted without requiring intervention from an external host processor integrated circuit. A variety of operating parameter information can be communicated through the die-to-die communication links so that the integrated circuit dies can quickly adjust to changing signal conditions without requiring intervention by the external host processor integrated circuit.