I/O Edge Detection for Dynamic High-Speed Signal Alignment
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Solution Overview
Problem
High-speed input signals in integrated circuits often fail to be sampled at the center of their eye pattern, leading to alignment issues that existing technologies struggle to address effectively.
Innovation Solution
An edge detector is integrated into the input/output interface of the integrated circuit, utilizing delay lines and sampling flip flops to determine if the input signal is too early or late compared to the clock signal, and adjusting the delay accordingly to align the signal dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing alignment technologies are used, then signal alignment can be achieved, but the logic fabric circuitry becomes complex and power consumption increases
Solution Approach 1:
The patent extracts the alignment detection function from the complex logic fabric by introducing a dedicated edge detector component. This detector is specifically designed to identify signal edges and determine timing relationships, separating this specialized function from the general-purpose logic fabric and thereby reducing overall system complexity while maintaining alignment precision.
Solution Approach 2:
The edge detector acts as an intermediary component between the input signal and the logic fabric. It processes the signal timing information and provides simplified control signals to the logic fabric, reducing the computational burden on the logic fabric and decreasing its complexity requirements while preserving precise alignment capability.
2Measurement precision
If existing alignment technologies are used, then signal alignment can be achieved, but power consumption increases
Solution Approach 1:
The patent extracts the power-intensive timing detection function into a dedicated edge detector module. This specialized module uses simple edge detection circuitry that consumes less power than general-purpose logic fabric operations, thereby reducing overall power consumption while maintaining the precision needed for signal alignment.
Solution Approach 2:
The edge detector uses simple, low-cost detection logic that operates only when needed (on signal edges) rather than continuously complex processing. This approach consumes less power by using simpler circuitry that activates only during critical timing events rather than sustained complex operations.
3Measurement precision
If dynamic alignment is implemented, then signal alignment precision is improved, but the device complexity increases
Solution Approach 1:
The edge detector automatically detects signal edges and determines timing relationships without requiring complex external control mechanisms. It self-regulates the alignment process by continuously monitoring signal edges and providing real-time timing information, eliminating the need for complex external alignment controllers and reducing overall device complexity.
Solution Approach 2:
The edge detector provides continuous feedback about signal timing relationships to the system. This feedback mechanism enables dynamic alignment by constantly monitoring edge positions and allowing real-time adjustments, achieving high precision without requiring complex open-loop control systems.
Data Source
AI summary
A method and apparatus for dynamically aligning high-speed signals in an integrated circuit are disclosed. For example, an integrated circuit according to one embodiment includes a logic fabric and at least one input/output interface coupled to the logic fabric. The input/output interface includes a plurality of input/output sites and an edge detector coupled to the plurality of input/output sites for detecting an edge in an input signal received by the integrated circuit. A plurality of delay lines are used to determine whether the input signal arrives too early or too late compared to a clock signal in the integrated circuit, and delays in the delay lines are adjusted to align the input signal with the clock signal in the integrated circuit.