Oscillator Calibration with Dynamic Divider Adjustment for Clock Drift
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Solution Overview
Problem
Oscillator clock signals in consumer electronics are prone to frequency deviations due to environmental factors like temperature, humidity, and power supply stability, leading to unstable operations and synchronization failures.
Innovation Solution
A calibration module that compares the frequency of an oscillator module's clock signal with a reference signal from an external device, calculates a new frequency division coefficient, and adjusts the frequency divider to maintain stable operation by recalibrating the oscillator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the oscillator operates in various environmental conditions, then the oscillator can be widely applied, but the frequency deviation increases due to temperature, humidity, and power supply variations
Solution Approach 1:
The patent implements a feedback mechanism where the oscillator calibration module continuously monitors the frequency of the clock signal and compares it with a reference frequency. Based on the detected frequency deviation, the module automatically adjusts the oscillation frequency by modifying the capacitance of the calibration capacitor, thereby maintaining accurate frequency despite environmental variations.
Solution Approach 2:
The patent changes the electrical parameter (capacitance) of the calibration capacitor to adjust the oscillation frequency. By varying the capacitance value through the calibration module, the system compensates for frequency deviations caused by environmental factors such as temperature and humidity changes.
2Device complexity
If the frequency division coefficient is fixed, then the oscillator module is simple in structure, but it cannot compensate for frequency deviations caused by environmental factors
Solution Approach 1:
The patent transforms the fixed frequency division coefficient into a dynamic, adjustable parameter. The calibration module can modify the effective capacitance in the oscillation circuit, thereby dynamically adjusting the oscillation frequency to compensate for environmental variations and maintain reliable operation.
3Ease of operation
If calibration is performed manually, then the calibration process is simple to understand, but it is time-consuming and affects productivity
Solution Approach 1:
The patent implements self-service calibration where the oscillator calibration module automatically detects frequency deviations and adjusts the capacitance without requiring manual intervention. The system autonomously compares the clock signal frequency with the reference frequency and performs necessary adjustments, significantly improving calibration efficiency while maintaining ease of operation through automated processes.
Data Source
AI summary
A method for calibrating a first clock signal output by an oscillation module to obtain a calibrated second clock signal includes obtaining a first count value by counting a third clock signal of an external device. A second count value is obtained by counting a scan signal of the oscillation module, and a first cycle ratio is obtained based on the first count value and the second count value. It is determined whether the first clock signal has a frequency deviation by comparing the first cycle ratio with a reference cycle ratio. A frequency division coefficient of the oscillation module is adjusted when the first clock signal has the frequency deviation, so that the oscillation module divides a frequency of the first clock signal according to the adjusted frequency division coefficient, thereby obtaining the calibrated second clock signal.