Electronic Oscillator With Independent Varactor Control for Precise Tuning
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Solution Overview
Problem
Existing electronic oscillators face challenges in achieving accurate adjustments of oscillation frequency, particularly in systems requiring high precision like UWB systems, due to the need for larger capacitor banks and lower charge capacitive element values.
Innovation Solution
The electronic oscillator incorporates a resonator coupled with distinct variable capacitive elements and a control device that independently controls these elements, allowing for precise adjustment of the oscillation frequency without increasing the number of capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the value of the charge capacitive element is reduced to achieve higher oscillation frequency adjustment accuracy, then the frequency adjustment precision is improved, but the oscillator becomes more sensitive to capacitance variations and requires larger capacitor banks
Solution Approach 1:
The charge capacitive element is segmented into two distinct variable capacitive elements (first and second variable capacitive elements), each independently controllable. This segmentation allows fine adjustment of the total capacitance value by independently varying each element, achieving high frequency adjustment accuracy without requiring an excessively large capacitor bank. Each element can be controlled within a specific range, dividing the total adjustment task and reducing the complexity of any single capacitor bank.
2Measurement precision
If the number of capacitors in the banks is increased to achieve higher adjustment accuracy, then the frequency tuning precision is improved, but the device complexity and area increase
Solution Approach 1:
By dividing the charge capacitive element into two independently controllable variable capacitive elements, the patent achieves high adjustment accuracy without requiring a single large capacitor bank with many capacitors. Each variable capacitive element can be implemented with a smaller number of capacitors, reducing overall device complexity while maintaining or improving adjustment precision through coordinated control of both elements.
Solution Approach 2:
The patent employs variable capacitive elements that can dynamically adjust their capacitance values independently. This dynamic control allows the system to achieve fine frequency adjustment by varying the capacitance of each element in real-time, replacing the need for static, large-scale capacitor banks with multiple fixed-value capacitors.
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 solution enables precise and independent control of the variable capacitive elements, enhancing the accuracy of oscillation frequency adjustments and reducing the complexity of the oscillator design.
Implementation Method 1
The resonator corresponds to a quartz resonator or to a Micro-Electro-Mechanical System (MEMS) resonator
Data Source
AI summary
The present description concerns an electronic oscillator comprising a resonator coupled in parallel to at least one active circuit, the resonator comprising two electrodes coupled to separate variable capacitive elements forming a charge capacitive element of the electronic oscillator, and a control device configured to independently control the values of the variable capacitive elements.