Variable Phase Amplifier for Resonator Frequency Tuning
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Solution Overview
Problem
Conventional tuning methods for electromechanical oscillators with mechanical resonators are limited to adjusting the resonance frequency on one side of the series resonance peak, making it difficult to accurately tune the oscillator due to manufacturing tolerances and environmental variations.
Innovation Solution
A variable phase amplifier circuit that adjusts the phase of the input differential signal pair, allowing for tuning of the mechanical resonator's oscillating frequency on both sides of the series resonance peak by shifting the phase of the signal fed back to the resonator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional tuning methods are used to adjust the resonance frequency, then the oscillator can be tuned within a limited range on one side of the series resonance peak, but the tuning accuracy is limited and cannot compensate for manufacturing tolerances and environmental variations
Solution Approach 1:
The patent applies dynamics by making the phase of the feedback signal variable rather than fixed. By controlling the phase of the signal fed back to the resonator, the system can dynamically adjust the operating frequency across a wider range, enabling accurate tuning on both sides of the series resonance peak and compensating for manufacturing tolerances and environmental variations.
Solution Approach 2:
The patent changes the phase parameter of the feedback signal to achieve frequency tuning. By varying the phase of the signal fed back to the resonator, the system can shift the operating frequency across a broader range, allowing accurate compensation for manufacturing tolerances and environmental variations while extending beyond the limited conventional tuning range.
2Manufacturing precision
If the mechanical resonator is designed with specific size, shape, and material to achieve desired resonance frequency, then the resonator can be optimized for a target frequency, but manufacturing tolerances cause deviations from the intended resonance frequency
Solution Approach 1:
The patent uses feedback by taking a portion of the output signal and feeding it back to the resonator with controllable phase. This feedback mechanism allows the system to compensate for frequency deviations caused by manufacturing tolerances and environmental variations, maintaining reliable operation at the desired resonance frequency without requiring extremely tight manufacturing precision.
Solution Approach 2:
The patent changes the phase parameter of the feedback signal to compensate for frequency deviations. By adjusting the phase of the feedback signal, the system can correct for manufacturing tolerances and environmental variations, ensuring reliable frequency stability without requiring strict manufacturing tolerances on the resonator itself.
3Measurement precision
If the oscillator is tuned to compensate for manufacturing tolerances and environmental variations, then the frequency accuracy can be maintained, but conventional methods are limited to tuning on only one side of the series resonance peak
Solution Approach 1:
The patent applies dynamics by implementing variable phase control of the feedback signal. This dynamic control mechanism enables the system to accurately tune the resonator frequency not only to compensate for manufacturing tolerances and environmental variations but also to extend the tuning range to both sides of the series resonance peak, providing both accuracy and flexibility.
Solution Approach 2:
The patent changes the phase parameter of the feedback signal to achieve both frequency accuracy and tuning flexibility. By varying the phase of the feedback signal, the system can maintain accurate frequency compensation for manufacturing tolerances and environmental variations while simultaneously enabling extended tuning capability on both sides of the series resonance peak.
Data Source
AI summary
A variable phase amplifier circuit is disclosed and its method of use in tuning devices having resonators. The variable phase amplifier receives an input differential signal pair. The input differential signal pair can be generated by a resonator device. The variable phase amplifier generates a modified differential signal pair in response to receiving the input differential signal pair. The variable phase amplifier provides a means to vary the phase of the modified differential signal pair with respect to the input differential signal pair, in an accurate and stable manner. If the modified differential signal pair with a phase shift introduced in it is fed back to the resonator device, the resonator will change its frequency of oscillation, where the new frequency of oscillation is a function of the phase of the modified differential signal pair.