Oscillation device and electronic device
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Solution Overview
Problem
Passive crystal oscillators in integrated circuits are susceptible to frequency shifts due to external mechanical vibrations and temperature changes, leading to inaccurate frequency output and poor synchronization efficiency.
Innovation Solution
An oscillation device comprising a detection module, an oscillation module, and a control module that adjusts the capacitance of a variable capacitance module based on temperature and fan rotational speed, using a preset correspondence to maintain stable oscillation frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a passive crystal oscillator is used for its simplicity and low cost, then manufacturing precision and ease of manufacture are improved, but the output frequency becomes sensitive to temperature and mechanical vibration, worsening reliability and measurement precision
Solution Approach 1:
The patent implements a feedback mechanism where a detection module continuously monitors temperature and fan rotational speed, and a control module adjusts the capacitance of a variable capacitance module based on these parameters to compensate for frequency deviations caused by thermal and mechanical vibrations, thereby maintaining stable oscillation frequency
Solution Approach 2:
The patent changes the capacitance parameter of the variable capacitance module dynamically based on temperature and vibration conditions. By adjusting this electrical parameter in response to environmental changes, the system compensates for frequency drift while keeping the basic passive crystal oscillator structure intact
2Device complexity
If a passive crystal oscillator is used for its simplicity, then device complexity is reduced, but the output frequency shifts under external mechanical vibration and temperature changes, worsening measurement precision
Solution Approach 1:
The detection module monitors temperature and fan rotational speed, feeding this information to the control module which adjusts the variable capacitance module to compensate for frequency shifts, thereby maintaining precise frequency output without significantly increasing overall system complexity
Solution Approach 2:
The variable capacitance module acts as an intermediary element between the passive crystal oscillator and the external environment. It mediates the frequency stability by providing dynamic capacitance adjustment that counteracts the effects of temperature and mechanical vibration on the oscillator
3Reliability
If capacitance adjustment is implemented to compensate for temperature and vibration effects, then reliability and frequency accuracy are improved, but device complexity increases due to additional modules
Solution Approach 1:
The control module performs multiple functions: it receives temperature data from the detection module, processes fan rotational speed information, determines appropriate capacitance adjustment parameters based on preset correspondences, and executes the adjustment of the variable capacitance module. This multi-functionality reduces the need for separate dedicated components for each function
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 solution reduces the influence of temperature and vibration on the oscillation module, ensuring accurate clock signal output and improved environmental adaptability of electronic devices.
Implementation Method 1
Based on a piezoelectric effect of a wafer, electrodes are plated on both sides of a cut wafer to form the piezoelectric wafer. An electric field is applied between the electrodes through an external circuit, to cause mechanical deformation of the wafer, and accordingly, an electric field is generated in a corresponding direction under action of the mechanical deformation.
Implementation Method 2
The oscillation module is configured to oscillate to output a clock signal, where a frequency of the clock signal varies with a capacitance of the variable capacitance module.
Data Source
AI summary
An oscillation device and an electronic device are provided. The oscillation device is applied to the electronic device. The electronic device includes a fan. The oscillation device includes a detection module, an oscillation module, a variable capacitance module, and a control module. The control module is electrically coupled with the detection module, the variable capacitance module, and the oscillation module. The control module is configured to determine a capacitance adjustment parameter according to a preset correspondence, and a temperature of the electronic device and/or a rotational speed of the fan, where the preset correspondence includes a correspondence between capacitance adjustment parameters and temperatures of the electronic device and/or rotational speeds of the fan. The control module is configured to adjust a capacitance of the variable capacitance module according to the capacitance adjustment parameter.