| 摘要 |
PURPOSE:To proportionally control the linearity by controlling two power switching elements on the basis of the output of a free-running multivibrator which generates a pulse in frequency in response to a voltage signal, thereby eliminating the influence of a commercial frequency. CONSTITUTION:A pulse of frequency in response to a voltage value set by a voltage signal setter 5 is generated by a free-running multivibrator 6. A monostable multivibrator 8 and a T-type flip-flop 7 are driven by the output pulse, and the outputs of both are input to OR circuits 9, 10. The outputs of the OR circuits 9, 10 are respectively input to signal inverting amplifiers 11, 12, and two power switching elements 13, 14 are alternately driven by the output pulse. Further, a double voltage rectifier 18 is used as a power source. |
