| 摘要 |
PURPOSE:To multiply a frequency with extremely simple circuit constitution by turning on two common-collector transistors (TR) alternately for a certain time every time a capacitor is charged or discharged. CONSTITUTION:A transistor TR1 for signal input turns on and off for every time T in accordance with an input signal (a). A capacitor 4 is charged or discharged repeatedly each time the TR1 turns on or off; the charging is performed through a TR2 for time T1 after the TR1 turns off, and the discharging is performed through TRs 1 and 3 for time T2 after the TR1 turns on. Therefore, the TRs 2 and 3 turn on alternately for time periods T1 and T2 every time the capacitor 4 is charged or discharged, and the collectors of the TRs 2 and 3 are connected in common, so an output signal (b) having a frequency twice as high as that of the signal (a) appears at an output terminal 10 which is their common connection point. |
