| 摘要 |
PURPOSE:To automatically obtain rectangular waves of 50% in duty by impressing the output of a non-inversional logic circuit which inputs the output of an inversional logic circuit, to the input terminal of which a capacitor is connected, upon the input terminal of the inversional logic circuit through a charging/discharging circuit composed of resistors and a capacitor. CONSTITUTION:Since waves or triangle waves are impressed upon an input terminal 101. The sine waves or triangle waves are inputted to the input terminal of an inversional logic circuit 103 through a capacitor 102 and rectangular waves of 50% in duty are obtained on the output side of the circuit 103. Namely, when the output signal of the circuit 103 is impressed upon the input of a non- inversional logic circuit 104, pulse signals having the same duty are obtained as the output of the circuit 104. When the output signals are supplied to a charging/discharging circuit composed of resistors 105 and a capacitor 106, a voltage which is proportional to the duty of aimed rectangular wave signals is obtained across both ends of the capacitor 106. When the voltage is applied across the input terminal of the circuit 103 through a resistor 108, the center potential of the inputted sine or triangle waves can be fluctuated proportionally to the duty of the aimed rectangular wave signals. |
