Oven Controlled Crystal Oscillator Through Slot Design
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Solution Overview
Problem
Existing oven controlled crystal oscillators face challenges with compact design due to the height of thermostatic baths and unreliable electrical connections between circuit boards, which affect frequency stability and weight.
Innovation Solution
The design incorporates a thermostatic bath inserted through a slot in the outer circuit board, with pins connecting the inner and outer circuit boards, and strategically positioned heating elements and temperature sensors to enhance stability and reduce height, improving electrical connections and thermal uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thermostatic bath is located over the outer circuit board, then the frequency stability is maintained, but the height of the oscillator increases
Solution Approach 1:
The patent changes the spatial arrangement by having the thermostatic bath pass through the outer circuit board rather than being positioned above it. This dimensional reconfiguration allows the bath to extend in a different direction, reducing the overall height while maintaining the necessary thermal enclosure for frequency stability.
Solution Approach 2:
The thermostatic bath is nested through the outer circuit board structure, with the circuit board positioned within or alongside the bath rather than beneath it. This nesting approach allows multiple components to occupy overlapping spatial volumes, reducing the total height of the assembly.
2Reliability
If the pin extends from the bottom of the inner circuit board for electrical connection, then the electrical connection is established, but the connection performance is affected by vibration during assembly
Solution Approach 1:
Instead of extending the pin from the bottom of the inner circuit board upward through the thermostatic bath to connect with the outer circuit board, the patent inverts this arrangement. The pin now extends from the inner circuit board through the side wall of the thermostatic bath, changing the direction and point of connection to reduce vibration exposure during assembly.
3Reliability
If the thermostatic bath is made larger to ensure frequency stability, then the temperature control is improved, but the weight of the oscillator increases
Solution Approach 1:
The patent reduces weight by changing the dimensional configuration of the thermostatic bath. Instead of increasing the bath's volume or mass, the design optimizes its spatial arrangement through the circuit board, achieving temperature control stability without proportionally increasing weight.
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
This configuration results in a more compact, stable, and lightweight oven controlled crystal oscillator with improved frequency stability and reduced weight, aligning with the demands for modern electronic products.
Implementation Method 1
a heating element and a temperature sensor electrically connecting with the outer circuit board
Implementation Method 2
a temperature sensor electrically connecting with the outer circuit board
Implementation Method 3
utilizing a thermostatic bath to keep a constant temperature of the crystal oscillator or quartz crystal
Data Source
AI summary
An oven controlled crystal oscillator includes a thermostatic bath, an inner circuit board, an outer circuit board, a heating element, and a temperature sensor. The inner circuit board comprising a crystal oscillation circuit is positioned inside the thermostatic bath and electrically connected with the outer circuit board via a pin. The outer circuit board has a temperature control circuit and a power supply circuit. The heating element and the temperature sensor electrically connect with the outer circuit board. A through slot is formed through the outer circuit board, and the thermostatic bath is inserted into the through slot. By inserting the thermostatic bath into the through slot of the outer circuit board, the height and the weight of the oven controlled crystal oscillator are reduced, the electric connection performance is enhanced, and thus the stability of the output frequency of the oven controlled crystal oscillator is improved.