Differential Oscillator Temperature Compensation With Fewer Terminals
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Solution Overview
Problem
Existing oscillators face challenges in reducing the influence of temperature characteristics while maintaining high accuracy, often requiring complex configurations to achieve stable oscillation outputs.
Innovation Solution
An oscillator that uses a differential signal between the outputs of two oscillator circuits to generate a control signal for reducing temperature-related influences, incorporating a frequency reduction unit, switching unit, and heat regulating unit to maintain constant temperatures, thereby simplifying the configuration and enhancing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor and cubic function memory are used for temperature compensation, then frequency accuracy is improved, but device complexity increases
Solution Approach 1:
The patent extracts the temperature sensing function from a dedicated temperature sensor and implements it using the existing differential oscillation circuit. The frequency difference between the two oscillator circuits directly reflects temperature changes, eliminating the need for separate temperature sensing components and complex lookup tables.
Solution Approach 2:
The differential oscillation circuit serves multiple functions: it generates the primary frequency signal f1, provides temperature detection through frequency difference Δf, and enables frequency compensation. This multi-functionality reduces device complexity by eliminating dedicated temperature sensor and memory components.
2Adaptability or versatility
If adjustment terminals are added for frequency measurement and extraction, then oscillator adjustability is improved, but device complexity increases
Solution Approach 1:
The connecting terminals are designed to serve dual purposes: during normal operation they provide the oscillation output f1, and during adjustment mode they can be connected to external frequency measuring devices through the switching unit. This eliminates the need for separate adjustment terminals.
Solution Approach 2:
The switching unit dynamically reconfigures the terminal connections based on operational mode. During normal operation, terminals output frequency signal f1; during adjustment, they connect to frequency measuring devices. This dynamic switching enables multiple functions without permanent structural complexity.
3Speed
If high frequency signals are directly measured, then measurement speed is improved, but measurement difficulty increases due to frequency limitations of external devices
Solution Approach 1:
The frequency reduction unit acts as an intermediary between the high-frequency oscillation circuit and the external frequency measuring device. It converts the high-frequency signal f1 to a lower frequency signal that can be accurately measured by standard external devices, while preserving the frequency relationship for accurate measurement.
Data Source
AI summary
An oscillator uses a differential signal corresponding to a difference between an oscillation output f1 of a first oscillator circuit and an oscillation output f2 of a second oscillator circuit as a temperature detection value, and outputs a control signal for reducing an influence caused by a temperature characteristic of the oscillation output f1 based on the differential signal. The oscillator includes a switching unit configured to alternately switch between a first state where a first connecting terminal and a second connecting terminal are connected to a storage unit for access of an external computer to the storage unit, and a second state where the first connecting terminal and the second connecting terminal are respectively connected to a first signal path and a second signal path via a frequency reduction unit such that the output signals from the frequency reduction unit are extracted to an external frequency measuring unit.