Circuit system with supply voltage for driving an electromechanical switch

摘要

A circuit (10) for controlling operation of a load (16). In one example, a MEMS switch (20) is positioned in the circuit(10) to place the load (16) in one of a conducting state or a nonconducting state. A piezoelectric transformer (46) provides a relatively high voltage output signal or a relatively low voltage output signal to control movement of the switch (20) between a closed position, placing the load in the conducting state, and an open position. The high voltage output signal includes a frequency component in the resonant frequency range of the transformer (46). Control circuitry (65) provides an input voltage signal to the piezoelectric transformer (46) to provide the high voltage output signal or the low voltage output signal at the output terminals of the piezoelectric transformer (46).