CAPACITIVE LOAD DRIVING CIRCUIT AND CAPACITIVE LOAD DRIVING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an appropriate driving circuit speedily and at low cost by digitizing a circuit parameter in a capacitive load driving circuit. SOLUTION: The capacitive load driving circuit is constituted of an output circuit 1 which outputs voltage Vk to a terminal A of the capacitive load and limits the output current by a limiting resistor Ro, a stabilizing condenser Co placed between the output of the output circuit 1 and a ground, and an output circuit 2 which alternately outputs voltage Vc+Vs and voltage Vc-Vs in the repeating number f to a terminal B of the capacitive load and limits the output current by a limiting resistor Rp. In the driving circuit for driving the capacitive load by the output circuits 1 and 2, when the capacitance of the capacitive load is Cl, Rop=Ro+Rp, and Vk=Vc, the slew rate S of the driving circuit is S≥2*Vs/(Rop*Cl) with Rop