Dynamic Oscillator Clock Tuning for Frequency Accuracy Drift
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Solution Overview
Problem
Integrated oscillators in electronic devices face significant frequency variations due to manufacturing process, supply voltage, and temperature fluctuations, making it difficult to achieve accurate clock frequency regulation, which can lead to system failure.
Innovation Solution
An oscillator system with a frequency divider, tuning block, and control block that dynamically adjusts the clock frequency by converting the frequency into an electric magnitude signal for comparison with a reference, using an Up/Down counter to regulate the oscillator inputs, thereby minimizing errors from process, temperature, and voltage variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If an integrated oscillator is used to reduce dimensions and costs, then the device size and cost are improved, but the frequency accuracy deteriorates due to manufacturing process, voltage, and temperature variations
Solution Approach 1:
The patent implements dynamic frequency tuning by making the oscillator configuration adjustable through control blocks that modify the oscillator parameters in real-time based on feedback signals, allowing the system to adapt to environmental variations and maintain frequency accuracy despite using a compact integrated oscillator
Solution Approach 2:
The patent employs feedback mechanisms where the actual oscillator output frequency is measured, compared against a reference, and the difference is used to generate correction signals that adjust the oscillator parameters, thereby compensating for manufacturing variations and environmental effects while maintaining small device dimensions
2Reliability
If the oscillator frequency is set lower than target frequency to compensate for errors, then the reliability is improved by avoiding system failure, but the productivity deteriorates due to reduced operating frequency
Solution Approach 1:
Instead of statically lowering the oscillator frequency to ensure reliability, the patent implements dynamic frequency adjustment that allows the oscillator to operate at optimal frequencies under ideal conditions while automatically tuning to lower frequencies when environmental conditions require it, thus maintaining both high productivity and reliability
Solution Approach 2:
The patent changes the oscillator operating parameters dynamically based on environmental conditions and feedback signals, allowing the system to optimize the frequency setting in real-time rather than using a fixed conservative frequency, thereby achieving both high reliability and maximum productivity
3Manufacturing precision
If dynamic tuning components are added to the oscillator system, then the frequency accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent merges the tuning functions with the existing oscillator structure by integrating control blocks that share common elements with the oscillator core, such as using the same capacitive or resistive elements for both oscillation and tuning purposes, thereby improving frequency accuracy while minimizing the increase in device complexity
Solution Approach 2:
The patent designs control blocks and tuning elements that serve multiple functions - for example, capacitive elements that simultaneously participate in the oscillation mechanism and the frequency tuning process, reducing the need for separate dedicated tuning components and thus limiting the increase in system complexity
Data Source
AI summary
An oscillator system may include an oscillator block having a plurality of inputs and outputting a clock signal, a frequency divider block receiving the clock signal and outputting a divided clock signal, a tuning block receiving the divided clock signal and outputting a comparison signal, and a control block coupled to the tuning block. The control block may receive the comparison signal. The control block may include a configuration block for producing a plurality of outputs for the corresponding inputs of the oscillator block, and an Up/Down counter having outputs applied to the configuration block.