Constructing a stable feedback for a molecular-electronic sensor with small damping

The feedback loop of a low-damping molecular-electronic seismic sensor with a natural frequency of the mechanical system within the operational frequency range was simulated. It has been established that the stability of the feedback loop in this case can be reliably achieved using two compensating differentiating elements. The practically attainable upper limit of the operational frequency range thus achieved can exceed the resonance frequency of the sensor’s mechanical system by an order of magnitude. The experimental results are in good agreement with the modeling outcomes. The practically achieved operational frequency range of the sensor under feedback control is 1–400 Hz, with a noise level not exceeding 10−6 𝑔/ √ Hz.