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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
Published on: February 4, 2018
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Tunable Active Wien Filters Based on Memristors.
Elena Solovyeva1, Artyom Serdyuk1, Yury Inshakov1
1Department of Electrical Engineering Theory, Saint Petersburg Electrotechnical University "LETI", 197022 St. Petersburg, Russia.
Micromachines
|July 30, 2025
Summary
Memristors offer superior tuning for electronic devices. This study demonstrates a memristive Wien bridge filter with independently tunable frequency characteristics, achieving high precision validated by LTspice simulations.
Area of Science:
- Electrical Engineering
- Electronics
- Signal Processing
Background:
- Tunable electronic devices are crucial across various technical fields.
- Memristors offer programmable potentiometer functionality, enabling higher tuning quality than traditional mechanical or digital potentiometers.
- Active Wien bridge filters are widely used for signal processing applications.
Purpose of the Study:
- To investigate the performance of an active Wien bridge bandpass filter incorporating a memristor.
- To analyze the tunability of key frequency characteristics: resonance frequency, quality factor, and gain.
- To validate the analytical model through simulation and assess the precision of memristor-based tuning.
Main Methods:
- Nodal voltage method for filter analysis.
- Derivation of analytical expressions for frequency-dependent parameters.
- LTspice simulations to model filter behavior with varying memristance values.
- Comparison of simulated results with analytical predictions.
Main Results:
- Analytical dependences of resonance frequency, quality factor, and gain on Wien circuit and voltage divider parameters were obtained.
- Independent tuning of the filter's resonance frequency, quality factor, and gain was demonstrated.
- Simulated frequency characteristics showed less than 1% deviation from analytical results across different memristance values.
Conclusions:
- Memristors enable highly precise and independently tunable frequency characteristics in active Wien bridge filters.
- The memristive Wien filter offers superior performance and tuning capabilities compared to conventional potentiometers.
- The study validates the high precision of modeling and tuning for memristive filters, paving the way for advanced tunable electronic devices.
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