| 摘要 |
PURPOSE:To accurately control by correcting the width of an output pulse for controlling the ON time of a power switching circuit by the result for comparing the output voltage of a DC voltage circuit with the prescribed voltage. CONSTITUTION:An analog-to-digital converter 5 converts an analog voltage V1 into a digital value and inputs it as a control input to a pulse width modulator 9. An analog-to-digital converter 7 converts the output voltage of a DC voltage circuit 6 to a digital value and supplies it to the modulator 9. The modulator 9 corrects the pulse of the time width of K times of the control input value by comparing the output of the converter 7 with the output of a constant value output circuit 8 and outputs a power switching circuit 3. While the circuit 3 is closed, the output of the circuit 6 is supplied to a DC motor 4. |
