Oscillator Loop Filter Periodic Control for High-Temperature Reliability
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Solution Overview
Problem
Conventional oscillator circuits experience rapid degradation of components, particularly in high temperature environments, due to continuous operation of the loop filter.
Innovation Solution
The oscillator circuit incorporates a counter unit to count pulses of the oscillation signal, an integration unit to calculate and output integrated values of phase errors, and a set value generator to adjust the frequency setting value based on these values, activating only during predetermined periods to reduce component deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the loop filter always operates to maintain oscillation signal synchronization, then the synchronization performance is improved, but the component deterioration accelerates
Solution Approach 1:
The loop filter is operated periodically rather than continuously. The control unit activates the loop filter only at specific intervals to update the control value, allowing it to remain inactive during other periods. This periodic operation maintains synchronization performance while significantly reducing the operational burden and extending the lifespan of components within the loop filter.
2Stability of the object's composition
If the loop filter operates continuously to maintain frequency accuracy, then the oscillation signal stability is improved, but the component deterioration accelerates
Solution Approach 1:
The control unit implements periodic operation of the loop filter by activating it only at predetermined intervals to update the control value. During inactive periods, the loop filter maintains its previous state, preserving oscillation signal stability while reducing cumulative operational stress on components.
Solution Approach 2:
The system maintains oscillation signal stability through intelligent control that determines when loop filter operation is necessary. The control unit monitors system state and activates the loop filter only when updates are needed, allowing the system to self-regulate and maintain stability without continuous active intervention, thereby extending component lifespan.
Data Source
AI summary
An oscillator circuit includes an oscillating unit, a counter unit, and a set value generator. The oscillating unit is configured to output an oscillation signal having a frequency corresponding to an input frequency setting value. The counter unit is configured to count a number of pulses of the oscillation signal during a time period corresponding to a period of a reference signal input from outside. The set value generator is configured to generate the frequency setting value every predetermined time period based on the count of the pulses counted by the counter unit.