The driving system for piezoelectric speaker with low power consumption

A study was conducted to demonstrate the design guidelines to use the multiband compressor as the suppressor of the electrical power for piezoelectric speakers. The design guidelines stated that the driving system needed to be designed according to signals whose energy concentrated in high frequency band, as electrical admittance of the piezoelectric speakers increased along with power consumption in high frequency band. The performance of the proposed system was investigated and the cutoff frequency of high pass and low pass filters and parameter of compressor were optimized to satisfy two requirements, such as high frequency components of standard signal, which needed to go through without any suppression and energy of high frequency band needed to be suppressed without exceeding the maximum rating of the driving system when it was excess. The response in time domain needed to be calculated as the solution of ordinary differential equations for the equivalent circuit for accurate estimation.