In summary, Marutsu’s IFJM-001 is an amplifier module that linearly drives a piezo actuator with high efficiency. The maximum output is ±60V. The output stage bus voltage can be continuously varied in the range of ±25V to ±60V, according to the assumed maximum output, so efficiency of the amplifier can be optimized according to the actuator used. Applications include driving a piezo actuator or a high impedance speaker.