A Distributed Multi-Tier Orchestration Framework for the Rapid Recovery of Virtualized Network Functions

A charge amplifier is a key component of measurement systems based on piezoelectric transducers, as the accuracy of signal acquisition largely depends on its performance. While effective solutions exist for high-frequency applications, the implementation of charge amplifiers for quasi-static and single-shot measurements of signals containing a DC component remains challenging due to charge leakage from the storage capacitor, operational amplifier offset voltage drift, and sensitivity to common-mode interference. This paper proposes a novel charge amplifier architecture intended for quasi-static and single-shot measurements. The storage capacitor is placed outside the negative feedback loop, eliminating the need for a parallel discharge resistor and reducing charge losses during long measurement intervals. The scientific novelty of this study lies in the development of a charge amplifier architecture that separates the processes of piezoelectric sensor current amplification and charge storage, as well as in the proposed method for compensating offset-voltage-induced drift in the measurement circuit. In addition, the symmetrical input stage improves immunity to common-mode interference. A theoretical analysis of the major error sources, including capacitor self-discharge and operational amplifier offset effects, was carried out. Experimental validation of the proposed solution confirmed its suitability for quasi-static measurements and demonstrated improved performance compared with conventional charge amplifier topologies. The shortcomings of the prototype amplifier are also analyzed. Ways to overcome these shortcomings are proposed, and the prospects for the development of piezoelectric transducer charge amplifiers built on this principle are noted. In particular, implementing the amplifier as part of a specialized integrated circuit for piezoelectric measuring systems will significantly improve its characteristics.