Crystal Oscillator Frequency Matching for Faster Start-Up
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Solution Overview
Problem
Crystal oscillators have a long natural en-oscillation cycle, resulting in low en-oscillation speed due to their inherent characteristics, which limits their efficiency in resonant frequency matching and oscillation speed.
Innovation Solution
A crystal oscillator system comprising a first oscillator circuit, a frequency control circuit, and a crystal, where the frequency control circuit determines a frequency control amount based on the features of the electrical signal flowing through the crystal under a drive signal, adjusting the oscillation frequency to match the resonant frequency, thereby shortening the en-oscillation cycle and increasing speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the crystal oscillator operates with natural en-oscillation characteristics, then the oscillation frequency stability is maintained, but the en-oscillation cycle becomes long and en-oscillation speed becomes low
Solution Approach 1:
The patent applies preliminary action by pre-adjusting the oscillation frequency to match the resonant frequency before formal oscillation begins. The frequency control circuit performs frequency matching in advance during the en-oscillation phase, so that when the oscillation正式启动, the crystal is already at the optimal resonant frequency, eliminating the need for long natural en-oscillation cycles.
Solution Approach 2:
The patent implements feedback by using the frequency control circuit to continuously monitor the oscillation frequency and compare it with the resonant frequency. Based on this feedback, the circuit dynamically adjusts the oscillation frequency to maintain alignment with the resonant frequency, thereby reducing the en-oscillation cycle and improving en-oscillation speed while maintaining frequency stability.
2Speed
If the oscillation frequency is adjusted to match the resonant frequency, then the en-oscillation speed increases, but the device complexity increases due to additional frequency control circuit
Solution Approach 1:
The patent applies merging by integrating the frequency control circuit within the oscillator circuit itself, combining the frequency adjustment functionality with the existing oscillation generation components. This consolidation reduces overall device complexity while still achieving the benefit of faster en-oscillation speed through resonant frequency matching.
Solution Approach 2:
The patent implements self-service by designing the frequency control circuit to automatically adjust the oscillation frequency without requiring external intervention. The circuit autonomously monitors and corrects frequency deviations, performing the frequency matching function independently, which simplifies the overall system architecture while maintaining high en-oscillation speed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system enables the crystal oscillator to quickly en-oscillate by adjusting the oscillation frequency to match the resonant frequency, thereby reducing the natural en-oscillation cycle and enhancing the en-oscillation speed.
Implementation Method 1
Crystal oscillators are also called as quartz resonators, which are fabricated from quartz crystal sheets having a piezoelectric effect. Such quartz crystal sheets may generate mechanical vibrations under the effect of an externally applied alternative electric field.
Implementation Method 2
When a frequency of the alternative electrical field is the same as an inherited frequency of the quartz crystal, the vibrations are severe, which is a reflection of a crystal resonance feature.
Data Source
AI summary
A crystal oscillator and a method are provided for adjusting an oscillation frequency. The crystal oscillator includes: a first oscillator circuit, a frequency control circuit and a crystal; where the first oscillator circuit is configured to output a first drive signal having a first oscillation frequency to drive the crystal, and the frequency control circuit is configured to determine a frequency control amount according to a feature of an electrical signal flowing through the crystal under driving of the first drive signal, and adjust the first oscillation frequency according to the frequency control amount. When the technical solutions are applied to scenarios where the crystal oscillator is enabled to quickly en-oscillate, a natural en-oscillation cycle of the crystal oscillator may be shortened, and the en-oscillation speed is increased.