| 摘要 |
Provided is a digital controller, which is not oscillated even sensed on a load side but can be controlled to apply a desired voltage to a load. In a power amplifier for feeding an output voltage (vO) to a load connected through a load line, a load voltage (vL) and an output voltage (vO) are periodically sampled, and a manipulated variable (X1) is calculated from the output voltage (vO), the load voltage (vL) and an arbitrary target value (r), so that a control signal is outputted to the power amplifier on the basis of the manipulated variable (X1). In case an LC filter is connected with a load device (9) of the power amplifier to be controlled or in case the load line is long, therefore, the digital controller can be made so robust that it neither oscillates nor outputs even if sensed on the load side. |
