OCXO Dual-Container Layout for Stable Frequency Output
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Solution Overview
Problem
Existing oscillators using heater circuits to stabilize resonator temperatures face challenges in maintaining stable oscillation frequencies due to environmental temperature variations and heat generation effects on voltage stabilizers.
Innovation Solution
The oscillator design includes a first container with a crystal resonator and heater circuit floating inside a second container, along with a temperature detector and voltage stabilizer circuit, which stabilizes the supply voltage to the heater circuit, reducing the impact of heat generation on voltage stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the voltage stabilizer circuit is placed close to the heater circuit, then the voltage supply to the heater circuit is more stable, but the voltage stabilizer circuit is affected by heat generation from the heater circuit
Solution Approach 1:
The oscillator is divided into two separate containers: the first container houses the crystal resonator and heater circuit, while the second container houses the voltage stabilizer circuit. This segmentation physically separates the heat-generating heater circuit from the temperature-sensitive voltage stabilizer circuit, preventing thermal interference while maintaining electrical connection through the substrate.
Solution Approach 2:
The first container is nested inside the second container, creating a hierarchical structure where the resonator chamber is enclosed within the larger housing that contains the voltage stabilizer. This nested arrangement allows both components to be housed together while maintaining spatial separation through the container walls and supporting members.
2Device complexity
If the crystal resonator is directly mounted on the substrate, then the structure is simpler, but the resonator is affected by external temperature variations
Solution Approach 1:
The crystal resonator and heater circuit are extracted from the main housing and placed in a separate first container that is supported by insulating supporting members. This extraction isolates the resonator system from the heat-generating voltage stabilizer circuit and external temperature variations, while the heater circuit can still effectively heat the resonator within the confined container space.
Solution Approach 2:
The first container acts as a thermal enclosure that traps heat generated by the heater circuit around the crystal resonator, creating a localized thermal environment. The container walls provide thermal insulation that maintains temperature stability while allowing the simple substrate mounting structure to remain effective.
3Temperature
If the heater circuit operates at high power to compensate for temperature variations, then the temperature control is more effective, but the heat generation affects surrounding components
Solution Approach 1:
By segmenting the oscillator into separate containers, the high-power heater circuit can operate effectively to maintain resonator temperature without adversely affecting the voltage stabilizer circuit. The physical separation through container walls and supporting members contains the thermal energy where it is needed while protecting sensitive components from excessive heat.
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 ensures a stable oscillation frequency output by isolating the voltage stabilizer from heat generation, maintaining frequency stability regardless of environmental temperatures.
Implementation Method 1
a voltage stabilizer circuit, which stabilizes the supply voltage supplied to the heater circuit
Implementation Method 2
a heater circuit for stabilizing a temperature of an atmosphere in which the crystal resonator is placed
Implementation Method 3
a temperature detector configured to detect a temperature inside the first container
Implementation Method 4
The first container is supported in a state of floating inside the second container via supporting portions
Data Source
AI summary
Providing an OCXO having a highly stabilized output frequency. In an oscillator, which is an OCXO, crystal resonators, oscillator circuits, a temperature detector, and a heater circuit are disposed inside a first container, which is supported in a state of floating inside a second container, while a voltage stabilizer circuit for stabilizing a supply voltage supplied to the heater circuit is disposed apart from the first container inside the second container. Therefore, the supply voltage supplied to the heater circuit is stabilized. The voltage stabilizer circuit is less likely to be affected by heat generation of the heater circuit, thus obtaining a stable oscillation frequency output regardless of the environmental temperature.