Fan Chip Clock Frequency Offset Detection and Adjustment
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Solution Overview
Problem
Clock frequency offsets in fan chips during production lead to inaccuracies in fan control, resulting in suboptimal rotational speeds, which can cause overheating issues in electronic devices.
Innovation Solution
A detection system that generates a specific pattern pulse signal to determine the clock frequency offset of the fan chip, allowing for adjustments to internal frequency parameters to align with a target frequency, ensuring accurate fan control and rotational speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the fan chip is used without detection and adjustment, then the device complexity is reduced, but the manufacturing precision of clock frequency deteriorates
Solution Approach 1:
The patent applies preliminary action by performing clock frequency offset detection and adjustment during the production process before the fan chip is installed in the electronic device. The detection unit measures the clock frequency offset, and the adjustment unit corrects it in advance, ensuring that the fan chip operates at the required rotational speed without causing overheating issues later.
Solution Approach 2:
The patent introduces an intermediary detection unit and adjustment unit between the fan chip production process and the final product. These intermediary components facilitate the measurement and correction of clock frequency offset, acting as mediators that bridge the gap between production variability and performance requirements.
2Reliability
If the clock frequency offset is not detected and adjusted, then the ease of manufacture is improved, but the reliability of fan control deteriorates
Solution Approach 1:
The detection and adjustment of clock frequency offset is performed in advance during production, ensuring reliable fan control before the product is deployed. This preliminary action prevents control inaccuracies that would otherwise occur due to production-induced frequency offsets.
Solution Approach 2:
The patent implements a feedback mechanism where the detection unit continuously monitors the clock frequency offset, and the adjustment unit uses this feedback information to correct the frequency. This closed-loop feedback ensures that fan control accuracy is maintained despite variations in the production process.
3Manufacturing precision
If the clock frequency offset detection and adjustment process is implemented, then the manufacturing precision is improved, but the loss of time in production increases
Solution Approach 1:
By performing detection and adjustment during the production process rather than after deployment, the patent minimizes the time impact. The preliminary action allows for efficient batch processing and prevents rework or returns due to fan control issues.
Solution Approach 2:
The detection unit and adjustment unit are integrated into the fan chip itself, allowing the chip to perform self-detection and self-adjustment. This self-service capability eliminates the need for external complex testing equipment and reduces the time required for quality assurance.
Data Source
AI summary
The invention provides a system and method for detecting clock frequency offset of fan chip. The system comprises a fan chip and a control unit. A target pulse width is defined in the fan chip and the control unit. When the control unit executes a detection process of clock frequency offset for the fan chip, it will generate a specific pattern pulse signal and send the specific pattern pulse signal to the fan chip. The fan chip enters a detection mode of clock frequency offset according to the specific pattern pulse signal, generates a response signal including an actual target pulse width based on referring to the defined target pulse width, and send the response signal to the control unit. The control unit compares a difference between the actual target pulse width and the defined target pulse width to detect a clock frequency offset value of the fan chip.