| 摘要 |
To provide a driving circuit constituted by a first output stage including a charging means and a first constant current circuit, a second output stage including a discharging means and a second constant current circuit, a precharge/predischarge circuit composed of first and second differential circuits, an output circuit for outputting a desired voltage, and an operation control signal generating circuit for generating an operation control signal for controlling the precharge/predischarge circuit and the output circuit. At least the precharge/predischarge circuit is operated in the first half of an output period for outputting a desired voltage, and only the output circuit is operated in the second half of the output period.This configuration allows a capacitive load connected to an output terminal to be driven to around a desired voltage at high speed while sufficiently suppressing charging/discharging power caused by precharging and predischarging, reduction in driving speed, and idling current. |
