Dual-Oscillator Temperature Compensation via Shared Measurement Terminals
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Solution Overview
Problem
Existing oscillators face challenges in accurately suppressing the influence of temperature characteristics, requiring complex configurations and dedicated terminals for frequency measurement, which complicates the apparatus and increases production costs.
Innovation Solution
An oscillator that treats the differential signal between the oscillation outputs of two oscillator circuits as a temperature detection value, using a storage unit, signal processing unit, and switching unit to output a control signal that suppresses temperature influences, eliminating the need for dedicated terminals and simplifying the configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dedicated terminals and complex configuration are used for frequency measurement, then temperature compensation accuracy is improved, but device complexity and production cost increase
Solution Approach 1:
The connecting terminals are designed to serve dual purposes: during manufacturing, they enable frequency measurement by connecting to external measurement devices, and during normal operation, they connect to storage units for temperature compensation data. This eliminates the need for dedicated measurement terminals, reducing device complexity while maintaining measurement accuracy during the calibration phase.
Solution Approach 2:
The frequency measurement and characterization are performed in advance during manufacturing before the oscillator is deployed. The measured frequency-temperature characteristics are stored in storage units (ROM, RAM, or external storage), so that during normal operation, only pre-computed compensation data needs to be retrieved and applied, rather than performing real-time measurements.
2Difficulty of detecting and measuring
If dedicated terminals for frequency retrieval are provided, then frequency measurement capability is improved, but production cost and device simplicity deteriorate
Solution Approach 1:
The same connecting terminals are used for both frequency measurement during manufacturing and for normal operational data retrieval. By making the terminals multi-functional, the patent eliminates the need for separate dedicated measurement terminals, thereby reducing the number of components and simplifying the manufacturing process without compromising the ability to perform frequency measurements during calibration.
3Stability of the object's composition
If complex adjustment functions are implemented, then oscillation stability is improved, but device complexity increases
Solution Approach 1:
The oscillator implements a feedback mechanism where the output frequency is continuously monitored, compared against the reference frequency stored in the storage unit, and adjusted accordingly. The adjustment amount is calculated based on the frequency difference and applied to the oscillation circuit to maintain stable output, creating a closed-loop control system that automatically compensates for drift without requiring complex manual adjustment functions.
Data Source
AI summary
An oscillator outputs a control signal to suppress an influence caused by temperature characteristic of f1 based on a differential signal corresponding to difference between an oscillation output f1 of a first oscillator circuit and an oscillation output f2 of a second oscillator circuit treated as a temperature detection value. A switching unit switches between a first state and a second state. The first state is a state where a first connecting end and a second connecting end are connected to a storage unit for access from an external computer to the storage unit. The second state is a state where the first connecting end and the second connecting end are connected to a first signal path and a second signal path such that the respective f1 and f2 are retrieved from the first connecting end and the second connecting end to an external frequency measuring unit.