Autonomous Clock Duty Cycle Calibration for Timing Window Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Duty cycle distortion in clock signals within electrical circuit devices leads to reduced timing windows, data errors, and unreliable performance, especially at high input/output speeds, due to amplifiers, propagation distances, and parasitic conductor capacitance, which existing technologies fail to effectively mitigate.
Innovation Solution
The implementation of autonomous duty cycle calibration circuitry that adjusts trim values for clock signals based on predefined conditions, allowing for continuous calibration across varying voltages and temperatures without consuming additional processing resources, by enabling background operations and ensuring valid calibration values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If duty cycle calibration is performed continuously to maintain accurate timing windows, then timing precision is improved, but processing resource consumption increases
Solution Approach 1:
The patent implements periodic duty cycle calibration by monitoring specific conditions (such as temperature thresholds, voltage levels, or clock cycle counts) and triggering calibration operations only when these conditions are met. This approach maintains timing precision by performing calibration at appropriate intervals without continuously consuming processing resources, thus resolving the contradiction between measurement precision and resource consumption.
2Reliability
If autonomous calibration operations are enabled to maintain valid calibration values, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements autonomous duty cycle calibration where the calibration circuit automatically monitors its own calibration values and triggers recalibration when validity conditions are no longer met. The system self-manages the calibration process without external intervention, maintaining reliability through continuous self-validation while minimizing the need for complex external control logic.
Solution Approach 2:
The patent employs feedback mechanisms where the calibration circuit monitors calibration values and system conditions (temperature, voltage, clock characteristics) and uses this feedback to determine when recalibration is needed. This feedback-driven approach ensures reliability by maintaining valid calibration values while using straightforward conditional logic rather than complex control systems.
3Manufacturing precision
If calibration trim values are adjusted frequently to compensate for distortion variations, then manufacturing precision is improved, but loss of time increases
Solution Approach 1:
The patent performs duty cycle calibration during manufacturing and initialization phases before the device enters normal operation. By establishing accurate calibration values in advance, the system minimizes the need for frequent adjustments during operation, thus maintaining manufacturing precision while reducing time loss. The preliminary calibration accounts for expected variations in operating conditions.
Solution Approach 2:
The patent implements periodic recalibration triggered by specific conditions (temperature changes, voltage shifts, or accumulated operation time) rather than continuous adjustment. This approach maintains duty cycle accuracy by recalibrating at appropriate intervals when conditions warrant it, without unnecessarily consuming operational time, thus resolving the contradiction between manufacturing precision and time loss.
Data Source
AI summary
Several embodiments of electrical circuit devices and systems with clock distortion calibration circuitry are disclosed herein. In one embodiment, an electrical circuit device includes clock distortion calibration circuitry to calibrate a clock signal. The clock distortion calibration circuitry is configured to determine when one or more duty cycle calibration (DCC) conditions are met. When the DCC condition(s) are met, the clock distortion calibration circuitry is configured adjust a trim value associated with at least one of first and second duty cycles of first and second voltage signals, respectively. In some embodiments, the clock distortion calibration circuitry is configured to calibrate at least one of the first and the second duty cycles of the first and the second voltage signals using the adjusted trim value to account for duty cycle distortion encountered across various voltages and/or temperatures while the electrical circuit devices and/or systems remain in a powered on state.