| 摘要 |
<p>PURPOSE:To widen a variable frequency range by charging a capacitor by way of a power voltage supply, two resistances, a capacitor, two diodes, and a variable control voltage supply. CONSTITUTION:To the earth side of capacitor C17, charging diode D19 and discharging D20 are newly connected. In this circuit constitution, C17 is charged by way of resistances 15 and 16, C17, and D19 (charging time; t1) and discharged by way of D20, C17, and resitance 16 (discharging time; t2), thereby obtaining clock pulse CP. In addition, (t1) and (t2) become functions of variable control voltage E and since the both become smaller as E increases, the output of CP becomes smaller in period T, so that a high frequency can be obtained.</p> |
