Research News

New Noise Analysis Model Targets Resolution

Jan 24, 2024

In recent years, there's been a growing interest in developing mode-localized sensors that focus on the strength of their signals for better sensitivity. This offers a promising solution to overcome the limitations of traditional sensors. 

A research team led by Prof. ZOU Xudong from the State Key Laboratory of Transducer Technology with the Aerospace Information Research Institute (AIR), Chinese Academy of Sciences (CAS) introduced a decouple-decomposition (DD) noise analysis model, which was employed to achieve high-resolution in mode-localized tilt sensor featuring closed-loop circuitry. 

The study was published in Microsystems & Nanoengineering

The DD noise model is like a detective for our sensors, uncovering the hidden noise mysteries inside. It explores the various parts of the sensor's internal circuit, revealing how noise affects the mode-localized sensors’ performance. 

To make sense of this noise, the model uses a decoupling method, considering how the sensor's parts interact. By doing this, the model breaks down the sensor's closed-loop circuit, the inner workings of its weakly coupled resonators, into different paths. This allows it to study the noise related to the signal's strength (amplitude) and timing (phase).

The result provides a clearer picture of how noise behaves in the sensor's system. To prove this detective work is accurate, scientists use a computer program called MATLAB/Simulink, which acts like a virtual lab. The simulations confirm that the model is spot-on when compared to the theoretical analysis – it's like making sure the detective's findings are correct by double-checking the clues.

Significantly, this DD model is not limited to tilt sensors but is also applicable to a range of mode-localized sensors, opening up possibilities for advancements in various scientific and technological domains.