Oscillation Frequency Regulation with Variable Comparison Duration
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Solution Overview
Problem
Existing oscillation frequency regulating circuits require fixed overflow values and counter operation durations, leading to increased regulation and testing times, especially as precision increases, due to the need for repeated counter operations for each trimming bit, resulting in prolonged overall regulation duration.
Innovation Solution
An oscillation frequency regulating circuit that allows for the selection of multiple comparison values and corresponding comparison durations, enabling high precision regulation by adjusting the comparison value and duration based on the number of regulation iterations, allowing for shorter overall regulation times by using shorter durations for lower precision adjustments and longer durations for higher precision requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed overflow values and counter operation durations are used in oscillation frequency regulation, then the regulation process is simple to implement, but the overall regulation duration increases significantly
Solution Approach 1:
The patent applies dynamics by making the counter operation duration variable rather than fixed. The control unit dynamically adjusts the counter operation duration based on the current oscillation frequency measurement and the target frequency, allowing the regulation process to adapt to different precision requirements and reduce overall regulation time while maintaining simplicity in implementation.
2Measurement precision
If longer counter operation durations are used for high precision regulation, then the oscillation frequency precision improves, but the regulation time increases proportionally
Solution Approach 1:
The patent applies partial or excessive action by using variable counter operation durations that are adjusted according to the specific precision requirements at each regulation stage. Instead of always using the maximum duration required for highest precision, the system uses just enough counting time to achieve the necessary precision level, thereby reducing overall regulation time while maintaining adequate measurement precision.
Solution Approach 2:
The control unit dynamically determines the counter operation duration based on real-time feedback from frequency measurements and comparison with target values. This dynamic adjustment allows the system to use shorter counting durations when lower precision is sufficient and longer durations only when higher precision is needed, optimizing the trade-off between precision and time.
3Loss of time
If multiple comparison values and durations are implemented, then high precision regulation with reduced time is achieved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing a control unit that can handle multiple comparison values and variable counter operation durations through a single integrated logic structure. This multi-functional control unit eliminates the need for separate dedicated circuits for each comparison scenario, thereby achieving high precision fast regulation without proportionally increasing device complexity.
Solution Approach 2:
The system changes operational parameters (comparison values and counter duration) based on the regulation state rather than having fixed hardware configurations for each scenario. This parameter-based approach allows the same circuit to adapt to different precision requirements by modifying its operational characteristics, avoiding the need for complex multi-configuration hardware.
Data Source
AI summary
There is provided an oscillation frequency regulating circuit including: a measuring section that performs measurement based on an oscillation frequency of an oscillation circuit; a comparator section that compares a measurement value measured by the measuring section against a set comparison value over a set comparison duration; a setting section that sets a comparison value selected from a plurality of comparison values of different magnitudes and that sets in the comparator section the comparison duration according to the magnitude of the selected comparison value; and a regulation section that, based on the comparison result of the comparator section, regulates the oscillation frequency of the oscillation circuit such that the oscillation frequency that is measured by the measuring section becomes a target oscillation frequency.